./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.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/nla-digbench/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --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 19:39:48,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:39:48,965 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:39:48,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:39:48,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:39:49,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:39:49,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:39:49,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:39:49,008 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:39:49,009 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:39:49,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:39:49,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:39:49,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:39:49,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:39:49,013 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:39:49,014 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:39:49,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:39:49,014 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:39:49,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:39:49,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:39:49,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:39:49,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:39:49,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:39:49,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:39:49,019 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:39:49,019 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:39:49,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:39:49,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:39:49,020 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:39:49,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:39:49,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:39:49,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:39:49,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:39:49,021 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:39:49,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:39:49,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:39:49,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:39:49,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:39:49,022 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:39:49,022 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:39:49,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:39:49,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:39:49,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:39:49,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:39:49,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:39:49,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:39:49,286 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:39:49,286 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:39:49,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-11 19:39:50,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:39:50,911 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:39:50,911 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-11 19:39:50,925 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/acd5eba31/e39acf51942748378c1b60d1b9beeb1c/FLAG931d05ad7 [2024-09-11 19:39:50,942 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/acd5eba31/e39acf51942748378c1b60d1b9beeb1c [2024-09-11 19:39:50,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:39:50,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:39:50,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:39:50,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:39:50,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:39:50,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:39:50" (1/1) ... [2024-09-11 19:39:50,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5a2397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:50, skipping insertion in model container [2024-09-11 19:39:50,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:39:50" (1/1) ... [2024-09-11 19:39:50,982 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:39:51,149 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/nla-digbench/hard-ll.c[538,551] [2024-09-11 19:39:51,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:39:51,195 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:39:51,206 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/nla-digbench/hard-ll.c[538,551] [2024-09-11 19:39:51,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:39:51,232 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:39:51,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51 WrapperNode [2024-09-11 19:39:51,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:39:51,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:39:51,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:39:51,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:39:51,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,279 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-09-11 19:39:51,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:39:51,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:39:51,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:39:51,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:39:51,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,295 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,307 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 19:39:51,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,312 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:39:51,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:39:51,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:39:51,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:39:51,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (1/1) ... [2024-09-11 19:39:51,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:39:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:51,357 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 19:39:51,360 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 19:39:51,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:39:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:39:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:39:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:39:51,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:39:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:39:51,462 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:39:51,464 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:39:51,610 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-11 19:39:51,611 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:39:51,640 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:39:51,640 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:39:51,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:39:51 BoogieIcfgContainer [2024-09-11 19:39:51,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:39:51,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:39:51,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:39:51,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:39:51,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:39:50" (1/3) ... [2024-09-11 19:39:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6356bcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:39:51, skipping insertion in model container [2024-09-11 19:39:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:39:51" (2/3) ... [2024-09-11 19:39:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6356bcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:39:51, skipping insertion in model container [2024-09-11 19:39:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:39:51" (3/3) ... [2024-09-11 19:39:51,649 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-09-11 19:39:51,667 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:39:51,667 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:39:51,729 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:39:51,736 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;@4fc1c16b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:39:51,737 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:39:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:39:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:39:51,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:51,751 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:51,752 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2024-09-11 19:39:51,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:51,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256584183] [2024-09-11 19:39:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:51,938 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 19:39:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256584183] [2024-09-11 19:39:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256584183] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:39:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:39:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:39:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033858930] [2024-09-11 19:39:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:51,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:39:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:39:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:39:51,976 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:39:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:52,013 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2024-09-11 19:39:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:39:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:39:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:52,026 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:39:52,026 INFO L226 Difference]: Without dead ends: 21 [2024-09-11 19:39:52,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:39:52,035 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:52,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:39:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-11 19:39:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-11 19:39:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:39:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2024-09-11 19:39:52,078 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2024-09-11 19:39:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:52,079 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2024-09-11 19:39:52,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:39:52,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-09-11 19:39:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:39:52,083 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:52,083 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:52,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:39:52,084 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:52,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2024-09-11 19:39:52,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:52,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459206612] [2024-09-11 19:39:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:52,322 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 19:39:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:52,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459206612] [2024-09-11 19:39:52,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459206612] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:39:52,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:39:52,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:39:52,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671240067] [2024-09-11 19:39:52,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:52,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:39:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:39:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:39:52,326 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:39:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:52,389 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-11 19:39:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:39:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:39:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:52,391 INFO L225 Difference]: With dead ends: 34 [2024-09-11 19:39:52,391 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 19:39:52,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:39:52,393 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:52,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:39:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 19:39:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-09-11 19:39:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:39:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-09-11 19:39:52,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2024-09-11 19:39:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:52,410 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-09-11 19:39:52,410 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:39:52,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-09-11 19:39:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 19:39:52,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:52,411 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:52,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:39:52,412 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:52,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2024-09-11 19:39:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594459100] [2024-09-11 19:39:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:52,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:39:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:39:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594459100] [2024-09-11 19:39:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594459100] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:39:52,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:39:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:39:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564149286] [2024-09-11 19:39:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:52,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:39:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:39:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:39:52,607 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:39:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:52,704 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-11 19:39:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:39:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-11 19:39:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:52,705 INFO L225 Difference]: With dead ends: 38 [2024-09-11 19:39:52,706 INFO L226 Difference]: Without dead ends: 36 [2024-09-11 19:39:52,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:39:52,707 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:52,708 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:39:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-11 19:39:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2024-09-11 19:39:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:39:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-11 19:39:52,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2024-09-11 19:39:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:52,724 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-11 19:39:52,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:39:52,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-11 19:39:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 19:39:52,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:52,725 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:52,725 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 19:39:52,725 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:52,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2024-09-11 19:39:52,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:52,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589979138] [2024-09-11 19:39:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:52,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656486905] [2024-09-11 19:39:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:52,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:52,761 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 19:39:52,763 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 19:39:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:52,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:39:52,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:39:52,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:39:52,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589979138] [2024-09-11 19:39:52,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656486905] [2024-09-11 19:39:52,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656486905] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:39:52,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:39:52,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:39:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740054068] [2024-09-11 19:39:52,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:52,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:39:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:39:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:39:52,950 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:39:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:53,046 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-11 19:39:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:39:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-11 19:39:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:53,049 INFO L225 Difference]: With dead ends: 55 [2024-09-11 19:39:53,049 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 19:39:53,049 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:39:53,050 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:53,051 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:39:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 19:39:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-11 19:39:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 19:39:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-09-11 19:39:53,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2024-09-11 19:39:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:53,079 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-09-11 19:39:53,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:39:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-09-11 19:39:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:39:53,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:53,081 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:53,099 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 19:39:53,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:53,282 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:53,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2024-09-11 19:39:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222885428] [2024-09-11 19:39:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771131401] [2024-09-11 19:39:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:53,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:53,300 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 19:39:53,305 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 19:39:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:53,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-11 19:39:53,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:39:53,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:39:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:53,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222885428] [2024-09-11 19:39:53,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771131401] [2024-09-11 19:39:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771131401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:39:53,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:39:53,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-11 19:39:53,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28189554] [2024-09-11 19:39:53,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:53,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:39:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:39:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:39:53,696 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:39:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:53,836 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-11 19:39:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 19:39:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-09-11 19:39:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:53,840 INFO L225 Difference]: With dead ends: 57 [2024-09-11 19:39:53,842 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 19:39:53,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:39:53,844 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:53,846 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:39:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 19:39:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-09-11 19:39:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 19:39:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-09-11 19:39:53,871 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 25 [2024-09-11 19:39:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:53,872 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-09-11 19:39:53,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:39:53,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-09-11 19:39:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:39:53,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:53,874 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:53,890 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:39:54,078 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:54,079 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:54,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -447891575, now seen corresponding path program 1 times [2024-09-11 19:39:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822782410] [2024-09-11 19:39:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:54,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935758801] [2024-09-11 19:39:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:54,114 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 19:39:54,116 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 19:39:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:39:54,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:39:54,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 19:39:54,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822782410] [2024-09-11 19:39:54,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935758801] [2024-09-11 19:39:54,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935758801] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:39:54,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:39:54,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-11 19:39:54,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721512428] [2024-09-11 19:39:54,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:54,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:39:54,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:39:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:39:54,376 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 19:39:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:54,473 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2024-09-11 19:39:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:39:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-11 19:39:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:54,475 INFO L225 Difference]: With dead ends: 62 [2024-09-11 19:39:54,475 INFO L226 Difference]: Without dead ends: 60 [2024-09-11 19:39:54,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:39:54,476 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:54,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:39:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-11 19:39:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-11 19:39:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-11 19:39:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-11 19:39:54,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2024-09-11 19:39:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:54,508 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-11 19:39:54,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 19:39:54,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-11 19:39:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:39:54,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:54,510 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:54,527 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 19:39:54,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:39:54,711 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:54,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1669992559, now seen corresponding path program 1 times [2024-09-11 19:39:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:54,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872367552] [2024-09-11 19:39:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:39:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:39:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:39:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:39:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:39:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-11 19:39:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:39:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:54,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872367552] [2024-09-11 19:39:54,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872367552] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:39:54,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:39:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:39:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376691323] [2024-09-11 19:39:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:39:54,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:39:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:39:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:39:54,920 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:39:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:54,986 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2024-09-11 19:39:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:39:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-09-11 19:39:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:54,988 INFO L225 Difference]: With dead ends: 67 [2024-09-11 19:39:54,988 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 19:39:54,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:39:54,989 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:54,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 92 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:39:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 19:39:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-11 19:39:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 19:39:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-11 19:39:55,011 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 41 [2024-09-11 19:39:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:55,011 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-11 19:39:55,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:39:55,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-11 19:39:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 19:39:55,013 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:55,013 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:55,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 19:39:55,014 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:55,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2024-09-11 19:39:55,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698359114] [2024-09-11 19:39:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:55,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353129716] [2024-09-11 19:39:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:55,058 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 19:39:55,060 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 19:39:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:55,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-11 19:39:55,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 19:39:55,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:39:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 19:39:57,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:39:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698359114] [2024-09-11 19:39:57,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:39:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353129716] [2024-09-11 19:39:57,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353129716] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:39:57,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:39:57,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-09-11 19:39:57,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740367449] [2024-09-11 19:39:57,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:39:57,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 19:39:57,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:39:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 19:39:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:39:57,596 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-11 19:39:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:39:58,757 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2024-09-11 19:39:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 19:39:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2024-09-11 19:39:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:39:58,759 INFO L225 Difference]: With dead ends: 130 [2024-09-11 19:39:58,759 INFO L226 Difference]: Without dead ends: 107 [2024-09-11 19:39:58,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:39:58,761 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:39:58,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 184 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:39:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-11 19:39:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2024-09-11 19:39:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 60 states have internal predecessors, (64), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-11 19:39:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2024-09-11 19:39:58,792 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 55 [2024-09-11 19:39:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:39:58,792 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2024-09-11 19:39:58,792 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2024-09-11 19:39:58,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2024-09-11 19:39:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 19:39:58,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:39:58,794 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:39:58,812 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:39:58,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:59,000 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:39:59,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:39:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2024-09-11 19:39:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:39:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743057586] [2024-09-11 19:39:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:39:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:39:59,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355638842] [2024-09-11 19:39:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:39:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:39:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:39:59,025 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 19:39:59,026 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 19:39:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:39:59,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-11 19:39:59,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:39:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 19:39:59,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 19:40:00,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743057586] [2024-09-11 19:40:00,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:40:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355638842] [2024-09-11 19:40:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355638842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:40:00,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:40:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-11 19:40:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358235787] [2024-09-11 19:40:00,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:00,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:40:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:40:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:40:00,317 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-11 19:40:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:00,622 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2024-09-11 19:40:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:40:00,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 66 [2024-09-11 19:40:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:00,624 INFO L225 Difference]: With dead ends: 130 [2024-09-11 19:40:00,624 INFO L226 Difference]: Without dead ends: 94 [2024-09-11 19:40:00,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:40:00,625 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:00,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 177 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:40:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-11 19:40:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2024-09-11 19:40:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-11 19:40:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2024-09-11 19:40:00,653 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 66 [2024-09-11 19:40:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:00,653 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2024-09-11 19:40:00,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2024-09-11 19:40:00,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2024-09-11 19:40:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-11 19:40:00,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:00,655 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:00,674 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 19:40:00,858 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:00,859 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:00,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash -633576959, now seen corresponding path program 2 times [2024-09-11 19:40:00,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:00,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184034648] [2024-09-11 19:40:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:40:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:40:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:40:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:40:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:40:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:40:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:40:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:40:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:40:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-11 19:40:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-11 19:40:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184034648] [2024-09-11 19:40:01,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184034648] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425914749] [2024-09-11 19:40:01,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:40:01,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:01,088 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 19:40:01,089 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 19:40:01,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:40:01,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:40:01,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:40:01,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-11 19:40:01,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-11 19:40:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425914749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:40:01,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:40:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-11 19:40:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466128868] [2024-09-11 19:40:01,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:01,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:40:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:40:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:40:01,261 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:40:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:01,323 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2024-09-11 19:40:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:40:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 68 [2024-09-11 19:40:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:01,325 INFO L225 Difference]: With dead ends: 107 [2024-09-11 19:40:01,325 INFO L226 Difference]: Without dead ends: 88 [2024-09-11 19:40:01,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:40:01,326 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 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 19:40:01,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:40:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-11 19:40:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-11 19:40:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 57 states have internal predecessors, (61), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 19:40:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2024-09-11 19:40:01,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 68 [2024-09-11 19:40:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:01,357 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2024-09-11 19:40:01,357 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:40:01,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2024-09-11 19:40:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-11 19:40:01,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:01,359 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:01,375 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 19:40:01,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 19:40:01,560 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:01,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2024-09-11 19:40:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:01,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688360778] [2024-09-11 19:40:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:40:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:40:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:40:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:40:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:40:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:40:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:40:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:40:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:40:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-11 19:40:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-11 19:40:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:40:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688360778] [2024-09-11 19:40:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688360778] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212308028] [2024-09-11 19:40:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:01,857 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 19:40:01,857 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 19:40:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:01,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 19:40:01,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-11 19:40:02,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-11 19:40:02,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212308028] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:40:02,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:40:02,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 19 [2024-09-11 19:40:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059837594] [2024-09-11 19:40:02,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:40:02,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 19:40:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 19:40:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:40:02,629 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-09-11 19:40:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:02,931 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2024-09-11 19:40:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:40:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) Word has length 71 [2024-09-11 19:40:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:02,933 INFO L225 Difference]: With dead ends: 105 [2024-09-11 19:40:02,934 INFO L226 Difference]: Without dead ends: 88 [2024-09-11 19:40:02,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:40:02,935 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:02,935 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 160 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:40:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-11 19:40:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2024-09-11 19:40:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-11 19:40:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2024-09-11 19:40:02,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 71 [2024-09-11 19:40:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:02,966 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2024-09-11 19:40:02,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2024-09-11 19:40:02,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2024-09-11 19:40:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 19:40:02,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:02,968 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:02,985 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 19:40:03,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:03,170 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:03,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1539229007, now seen corresponding path program 1 times [2024-09-11 19:40:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:03,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787541771] [2024-09-11 19:40:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:40:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:40:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:40:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:40:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:40:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:40:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:40:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:40:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 19:40:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:40:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:40:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 19:40:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-11 19:40:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:40:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787541771] [2024-09-11 19:40:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787541771] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:40:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238387793] [2024-09-11 19:40:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:03,279 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 19:40:03,280 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 19:40:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:40:03,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-11 19:40:03,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-11 19:40:03,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:40:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238387793] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:40:03,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:40:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-11 19:40:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698952265] [2024-09-11 19:40:03,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:40:03,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:40:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:40:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:40:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:40:03,362 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:40:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:40:03,435 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2024-09-11 19:40:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:40:03,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-09-11 19:40:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:40:03,436 INFO L225 Difference]: With dead ends: 90 [2024-09-11 19:40:03,436 INFO L226 Difference]: Without dead ends: 78 [2024-09-11 19:40:03,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:40:03,437 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:40:03,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:40:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-11 19:40:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-11 19:40:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:40:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-09-11 19:40:03,460 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2024-09-11 19:40:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:40:03,461 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-09-11 19:40:03,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:40:03,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-09-11 19:40:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-11 19:40:03,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:40:03,462 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-11 19:40:03,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:40:03,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:03,663 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:40:03,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:40:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 3 times [2024-09-11 19:40:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:40:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139167046] [2024-09-11 19:40:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:40:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:40:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:40:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897745704] [2024-09-11 19:40:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:40:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:40:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:40:03,697 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 19:40:03,698 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 19:40:03,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:40:03,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:40:03,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:40:03,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:40:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-11 19:40:04,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:40:36,606 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:42:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-11 19:42:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139167046] [2024-09-11 19:42:02,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897745704] [2024-09-11 19:42:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897745704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:02,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:02,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-11 19:42:02,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055839081] [2024-09-11 19:42:02,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:02,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:42:02,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:02,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:42:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:42:02,342 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-11 19:42:19,953 WARN L293 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 108 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:42:26,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:42:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:38,708 INFO L93 Difference]: Finished difference Result 162 states and 210 transitions. [2024-09-11 19:42:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:42:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 85 [2024-09-11 19:42:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:38,710 INFO L225 Difference]: With dead ends: 162 [2024-09-11 19:42:38,710 INFO L226 Difference]: Without dead ends: 143 [2024-09-11 19:42:38,711 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 19:42:38,711 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:38,712 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 341 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-09-11 19:42:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-11 19:42:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2024-09-11 19:42:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 77 states have (on average 1.12987012987013) internal successors, (87), 82 states have internal predecessors, (87), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-11 19:42:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2024-09-11 19:42:38,761 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 85 [2024-09-11 19:42:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:38,761 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2024-09-11 19:42:38,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-11 19:42:38,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2024-09-11 19:42:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-11 19:42:38,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:38,765 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:38,777 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 19:42:38,965 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 19:42:38,966 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:38,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1552559470, now seen corresponding path program 1 times [2024-09-11 19:42:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082291572] [2024-09-11 19:42:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683539764] [2024-09-11 19:42:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:39,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:39,024 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 19:42:39,025 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 19:42:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:39,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 19:42:39,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 58 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-09-11 19:42:39,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082291572] [2024-09-11 19:42:42,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683539764] [2024-09-11 19:42:42,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683539764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:42,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:42:42,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:42:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556748485] [2024-09-11 19:42:42,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:42,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:42:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:42:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:42:42,762 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 19:42:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:43,322 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2024-09-11 19:42:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:42:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 96 [2024-09-11 19:42:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:43,324 INFO L225 Difference]: With dead ends: 146 [2024-09-11 19:42:43,324 INFO L226 Difference]: Without dead ends: 144 [2024-09-11 19:42:43,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:42:43,325 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:43,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 365 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:42:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-11 19:42:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2024-09-11 19:42:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 17 states have call predecessors, (36), 17 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-11 19:42:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2024-09-11 19:42:43,376 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 96 [2024-09-11 19:42:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:43,376 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2024-09-11 19:42:43,376 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-11 19:42:43,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2024-09-11 19:42:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-11 19:42:43,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:43,378 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:43,392 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 19:42:43,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:42:43,582 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:43,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1154059924, now seen corresponding path program 2 times [2024-09-11 19:42:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:43,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961813151] [2024-09-11 19:42:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:43,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736703510] [2024-09-11 19:42:43,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:42:43,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:43,608 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 19:42:43,619 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 19:42:43,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:42:43,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:43,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:42:43,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 19:42:44,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 19:42:55,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:55,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961813151] [2024-09-11 19:42:55,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:55,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736703510] [2024-09-11 19:42:55,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736703510] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:55,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:55,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-09-11 19:42:55,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632449077] [2024-09-11 19:42:55,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:55,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:42:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:42:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:42:55,628 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-11 19:42:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:57,916 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2024-09-11 19:42:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 19:42:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 96 [2024-09-11 19:42:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:57,919 INFO L225 Difference]: With dead ends: 157 [2024-09-11 19:42:57,919 INFO L226 Difference]: Without dead ends: 155 [2024-09-11 19:42:57,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:42:57,921 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:57,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 367 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 19:42:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-11 19:42:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2024-09-11 19:42:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 17 states have call predecessors, (36), 17 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-11 19:42:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2024-09-11 19:42:58,003 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 96 [2024-09-11 19:42:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:58,003 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2024-09-11 19:42:58,003 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-11 19:42:58,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2024-09-11 19:42:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-11 19:42:58,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:58,005 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:58,020 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 19:42:58,208 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:42:58,209 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:58,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -169235064, now seen corresponding path program 4 times [2024-09-11 19:42:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004242654] [2024-09-11 19:42:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:42:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:42:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:42:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:42:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:42:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:42:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:42:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:42:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 19:42:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:42:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:42:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-11 19:42:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-11 19:42:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-11 19:42:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-11 19:42:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-11 19:42:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004242654] [2024-09-11 19:42:58,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004242654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553449725] [2024-09-11 19:42:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:42:58,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:58,522 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 19:42:58,524 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 19:42:58,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:42:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:58,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:42:58,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-11 19:42:58,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-11 19:42:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553449725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:58,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:42:58,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-11 19:42:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207638055] [2024-09-11 19:42:58,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:58,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:42:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:42:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:42:58,929 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-11 19:42:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:59,076 INFO L93 Difference]: Finished difference Result 172 states and 206 transitions. [2024-09-11 19:42:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:42:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 98 [2024-09-11 19:42:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:59,078 INFO L225 Difference]: With dead ends: 172 [2024-09-11 19:42:59,078 INFO L226 Difference]: Without dead ends: 136 [2024-09-11 19:42:59,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:42:59,078 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:59,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:42:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-11 19:42:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2024-09-11 19:42:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 90 states have internal predecessors, (91), 32 states have call successors, (32), 17 states have call predecessors, (32), 17 states have return successors, (31), 26 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:42:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-09-11 19:42:59,140 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 98 [2024-09-11 19:42:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:59,140 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-09-11 19:42:59,141 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-11 19:42:59,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-09-11 19:42:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-11 19:42:59,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:59,142 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:59,162 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 19:42:59,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:42:59,347 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:59,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2060413457, now seen corresponding path program 1 times [2024-09-11 19:42:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:59,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92293048] [2024-09-11 19:42:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:59,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:42:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:42:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:42:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:42:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:42:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:42:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:42:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:42:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 19:42:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:42:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:42:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-11 19:42:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-11 19:42:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-11 19:42:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-11 19:42:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-11 19:42:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-11 19:42:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92293048] [2024-09-11 19:42:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92293048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322172322] [2024-09-11 19:42:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:59,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:59,782 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 19:42:59,784 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 19:42:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:59,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 19:42:59,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-11 19:43:00,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-11 19:43:01,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322172322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:43:01,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:43:01,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-09-11 19:43:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394225728] [2024-09-11 19:43:01,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:01,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:43:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:43:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:43:01,012 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2024-09-11 19:43:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:01,573 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2024-09-11 19:43:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:43:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) Word has length 101 [2024-09-11 19:43:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:01,574 INFO L225 Difference]: With dead ends: 150 [2024-09-11 19:43:01,574 INFO L226 Difference]: Without dead ends: 110 [2024-09-11 19:43:01,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:43:01,575 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:01,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:43:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-11 19:43:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-09-11 19:43:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 70 states have internal predecessors, (71), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-11 19:43:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2024-09-11 19:43:01,608 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 101 [2024-09-11 19:43:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:01,609 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2024-09-11 19:43:01,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2024-09-11 19:43:01,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2024-09-11 19:43:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-11 19:43:01,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:01,611 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:01,623 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 19:43:01,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:43:01,812 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:01,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2077808773, now seen corresponding path program 2 times [2024-09-11 19:43:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:01,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349556643] [2024-09-11 19:43:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 19:43:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:43:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 19:43:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 19:43:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:43:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:43:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:43:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-11 19:43:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:01,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-11 19:43:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-11 19:43:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 19:43:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-11 19:43:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-11 19:43:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-11 19:43:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-11 19:43:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-11 19:43:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-11 19:43:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-11 19:43:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 19:43:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349556643] [2024-09-11 19:43:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349556643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:43:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378619059] [2024-09-11 19:43:02,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:43:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:02,038 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 19:43:02,040 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 19:43:02,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:43:02,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:43:02,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:43:02,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 19:43:02,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-11 19:43:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378619059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:43:02,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:43:02,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-11 19:43:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356527067] [2024-09-11 19:43:02,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:02,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:43:02,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:43:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:43:02,291 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-11 19:43:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:02,379 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2024-09-11 19:43:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:43:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 113 [2024-09-11 19:43:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:02,380 INFO L225 Difference]: With dead ends: 114 [2024-09-11 19:43:02,380 INFO L226 Difference]: Without dead ends: 106 [2024-09-11 19:43:02,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:43:02,382 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:02,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:43:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-11 19:43:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-09-11 19:43:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 70 states have internal predecessors, (72), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-11 19:43:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-09-11 19:43:02,421 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 113 [2024-09-11 19:43:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:02,421 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-09-11 19:43:02,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-11 19:43:02,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-09-11 19:43:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-11 19:43:02,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:02,423 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:02,438 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 19:43:02,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-11 19:43:02,623 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:02,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash 395227745, now seen corresponding path program 1 times [2024-09-11 19:43:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226478295] [2024-09-11 19:43:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:02,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988231203] [2024-09-11 19:43:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:02,660 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 19:43:02,663 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 19:43:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:02,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-11 19:43:02,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 35 proven. 103 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-11 19:43:03,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 35 proven. 103 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-11 19:43:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226478295] [2024-09-11 19:43:31,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988231203] [2024-09-11 19:43:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988231203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:43:31,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:43:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-09-11 19:43:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594763279] [2024-09-11 19:43:31,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:31,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 19:43:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 19:43:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2024-09-11 19:43:31,180 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 16 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 14 states have call successors, (36) [2024-09-11 19:43:41,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:43:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:45,763 INFO L93 Difference]: Finished difference Result 194 states and 235 transitions. [2024-09-11 19:43:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-11 19:43:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 16 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 14 states have call successors, (36) Word has length 115 [2024-09-11 19:43:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:45,765 INFO L225 Difference]: With dead ends: 194 [2024-09-11 19:43:45,765 INFO L226 Difference]: Without dead ends: 175 [2024-09-11 19:43:45,766 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2024-09-11 19:43:45,767 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 138 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:45,767 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 614 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 821 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-11 19:43:45,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-11 19:43:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 161. [2024-09-11 19:43:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 102 states have (on average 1.088235294117647) internal successors, (111), 106 states have internal predecessors, (111), 38 states have call successors, (38), 20 states have call predecessors, (38), 20 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-11 19:43:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2024-09-11 19:43:45,855 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 115 [2024-09-11 19:43:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:45,855 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2024-09-11 19:43:45,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 16 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 14 states have call successors, (36) [2024-09-11 19:43:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2024-09-11 19:43:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-11 19:43:45,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:45,857 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:45,873 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 19:43:46,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:46,058 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:46,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash -355597988, now seen corresponding path program 2 times [2024-09-11 19:43:46,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:46,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513618184] [2024-09-11 19:43:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:46,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302587958] [2024-09-11 19:43:46,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:43:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:46,118 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 19:43:46,120 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 19:43:46,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:43:46,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:43:46,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-11 19:43:46,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 40 proven. 106 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-09-11 19:43:46,766 INFO L327 TraceCheckSpWp]: Computing backward predicates...