./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.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 8c5f43b3e9ff1d4598a5a525fe9e716f863331c4c517b4b8adb0491943243286 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:31:02,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:31:02,924 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:31:02,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:31:02,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:31:02,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:31:02,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:31:02,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:31:02,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:31:02,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:31:02,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:31:02,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:31:02,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:31:02,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:31:02,958 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:31:02,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:31:02,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:31:02,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:31:02,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:31:02,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:31:02,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:31:02,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:31:02,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:31:02,962 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:31:02,962 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:31:02,962 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:31:02,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:31:02,962 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:31:02,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:31:02,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:31:02,963 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:31:02,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:31:02,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:31:02,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:31:02,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:31:02,964 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:31:02,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:31:02,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:31:02,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:31:02,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:31:02,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:31:02,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:31:02,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c5f43b3e9ff1d4598a5a525fe9e716f863331c4c517b4b8adb0491943243286 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:31:03,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:31:03,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:31:03,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:31:03,223 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:31:03,224 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:31:03,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c [2024-09-21 11:31:04,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:31:04,683 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:31:04,684 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c [2024-09-21 11:31:04,689 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d85c8b6a3/9f0449eac254488fac558b662c466bad/FLAG5933cd0dc [2024-09-21 11:31:04,700 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d85c8b6a3/9f0449eac254488fac558b662c466bad [2024-09-21 11:31:04,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:31:04,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:31:04,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:31:04,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:31:04,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:31:04,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f51309f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04, skipping insertion in model container [2024-09-21 11:31:04,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:31:04,863 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c[319,332] [2024-09-21 11:31:04,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:31:04,890 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:31:04,904 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c[319,332] [2024-09-21 11:31:04,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:31:04,920 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:31:04,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04 WrapperNode [2024-09-21 11:31:04,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:31:04,921 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:31:04,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:31:04,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:31:04,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,936 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:31:04,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:31:04,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:31:04,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:31:04,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:31:04,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,945 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,953 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 11:31:04,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,961 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,962 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:31:04,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:31:04,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:31:04,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:31:04,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (1/1) ... [2024-09-21 11:31:04,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:31:04,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:04,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:31:05,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:31:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:31:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:31:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:31:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:31:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:31:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:31:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:31:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:31:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:31:05,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:31:05,084 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:31:05,085 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:31:05,184 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:31:05,184 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:31:05,203 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:31:05,204 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:31:05,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:05 BoogieIcfgContainer [2024-09-21 11:31:05,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:31:05,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:31:05,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:31:05,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:31:05,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:04" (1/3) ... [2024-09-21 11:31:05,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6dab94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:05, skipping insertion in model container [2024-09-21 11:31:05,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:04" (2/3) ... [2024-09-21 11:31:05,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6dab94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:05, skipping insertion in model container [2024-09-21 11:31:05,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:05" (3/3) ... [2024-09-21 11:31:05,216 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2024-09-21 11:31:05,228 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:31:05,228 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:31:05,264 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:31:05,269 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;@6ed93d67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:31:05,269 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:31:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:31:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:31:05,278 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:05,278 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:05,278 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:05,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1710538099, now seen corresponding path program 1 times [2024-09-21 11:31:05,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:05,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259430000] [2024-09-21 11:31:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:05,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259430000] [2024-09-21 11:31:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259430000] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:31:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:31:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:31:05,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269899215] [2024-09-21 11:31:05,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:31:05,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:31:05,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:31:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:31:05,429 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:05,444 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-21 11:31:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:31:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-21 11:31:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:05,450 INFO L225 Difference]: With dead ends: 30 [2024-09-21 11:31:05,450 INFO L226 Difference]: Without dead ends: 13 [2024-09-21 11:31:05,452 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:31:05,455 INFO L434 NwaCegarLoop]: 18 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, 18 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 [2024-09-21 11:31:05,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:31:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-21 11:31:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-21 11:31:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-21 11:31:05,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2024-09-21 11:31:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:05,478 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-21 11:31:05,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-21 11:31:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:31:05,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:05,480 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:05,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:31:05,480 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:05,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1720696830, now seen corresponding path program 1 times [2024-09-21 11:31:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:05,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164859011] [2024-09-21 11:31:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:05,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:05,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164859011] [2024-09-21 11:31:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164859011] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:31:05,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:31:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:31:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806455020] [2024-09-21 11:31:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:31:05,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:31:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:31:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:31:05,694 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:05,737 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-21 11:31:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:31:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-21 11:31:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:05,738 INFO L225 Difference]: With dead ends: 24 [2024-09-21 11:31:05,738 INFO L226 Difference]: Without dead ends: 16 [2024-09-21 11:31:05,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:31:05,740 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:05,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:31:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-21 11:31:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-09-21 11:31:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-09-21 11:31:05,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-09-21 11:31:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:05,747 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-09-21 11:31:05,747 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:05,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-09-21 11:31:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:31:05,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:05,749 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:05,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:31:05,749 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:05,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1696808404, now seen corresponding path program 1 times [2024-09-21 11:31:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693409290] [2024-09-21 11:31:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693409290] [2024-09-21 11:31:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693409290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:05,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255473851] [2024-09-21 11:31:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:05,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:06,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:06,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:31:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:06,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:31:06,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:06,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:06,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255473851] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:06,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:06,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2024-09-21 11:31:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156963589] [2024-09-21 11:31:06,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:06,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:31:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:31:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:31:06,187 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:06,256 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-09-21 11:31:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:31:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-21 11:31:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:06,257 INFO L225 Difference]: With dead ends: 31 [2024-09-21 11:31:06,257 INFO L226 Difference]: Without dead ends: 23 [2024-09-21 11:31:06,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:31:06,259 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:06,260 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:31:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-21 11:31:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-21 11:31:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-21 11:31:06,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2024-09-21 11:31:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:06,267 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-21 11:31:06,267 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-21 11:31:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 11:31:06,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:06,268 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-21 11:31:06,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:06,473 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:06,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 177718978, now seen corresponding path program 1 times [2024-09-21 11:31:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:06,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882430287] [2024-09-21 11:31:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:06,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:31:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882430287] [2024-09-21 11:31:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882430287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055567565] [2024-09-21 11:31:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:06,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:06,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:06,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:31:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:06,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:31:06,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:31:06,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:31:06,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055567565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:06,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2024-09-21 11:31:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101733043] [2024-09-21 11:31:06,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:06,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:31:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:31:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:31:06,744 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:06,822 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-09-21 11:31:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:31:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-21 11:31:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:06,824 INFO L225 Difference]: With dead ends: 43 [2024-09-21 11:31:06,824 INFO L226 Difference]: Without dead ends: 33 [2024-09-21 11:31:06,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-09-21 11:31:06,825 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:06,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:31:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-21 11:31:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-09-21 11:31:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-21 11:31:06,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2024-09-21 11:31:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:06,841 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-21 11:31:06,841 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-21 11:31:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 11:31:06,842 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:06,842 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:06,856 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 11:31:07,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:07,045 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:07,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1559699330, now seen corresponding path program 2 times [2024-09-21 11:31:07,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:07,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595589898] [2024-09-21 11:31:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:07,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:07,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:07,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595589898] [2024-09-21 11:31:07,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595589898] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:07,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100401946] [2024-09-21 11:31:07,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:31:07,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:07,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:07,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:07,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:31:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:31:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:07,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-21 11:31:07,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:07,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:07,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100401946] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:07,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:07,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 21 [2024-09-21 11:31:07,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112007624] [2024-09-21 11:31:07,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:07,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:31:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:31:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:31:07,656 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:08,063 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-09-21 11:31:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 11:31:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-21 11:31:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:08,065 INFO L225 Difference]: With dead ends: 50 [2024-09-21 11:31:08,065 INFO L226 Difference]: Without dead ends: 42 [2024-09-21 11:31:08,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2024-09-21 11:31:08,066 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:08,067 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:31:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-21 11:31:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-21 11:31:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-21 11:31:08,078 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 22 [2024-09-21 11:31:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:08,079 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-21 11:31:08,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:08,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-21 11:31:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 11:31:08,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:08,080 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:08,094 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:31:08,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:08,285 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:08,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1391137686, now seen corresponding path program 2 times [2024-09-21 11:31:08,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:08,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950528005] [2024-09-21 11:31:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:08,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950528005] [2024-09-21 11:31:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950528005] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482592635] [2024-09-21 11:31:08,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:31:08,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:08,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:08,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:08,420 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:31:08,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:31:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:08,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 11:31:08,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:08,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482592635] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:08,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:08,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2024-09-21 11:31:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384444343] [2024-09-21 11:31:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:08,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 11:31:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 11:31:08,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:31:08,709 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:09,236 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-09-21 11:31:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:31:09,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-21 11:31:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:09,237 INFO L225 Difference]: With dead ends: 67 [2024-09-21 11:31:09,238 INFO L226 Difference]: Without dead ends: 59 [2024-09-21 11:31:09,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2024-09-21 11:31:09,238 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:09,239 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:31:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-21 11:31:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2024-09-21 11:31:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-09-21 11:31:09,249 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2024-09-21 11:31:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:09,249 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-09-21 11:31:09,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-09-21 11:31:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 11:31:09,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:09,250 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:09,266 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:31:09,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:09,451 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:09,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1127962306, now seen corresponding path program 3 times [2024-09-21 11:31:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148357392] [2024-09-21 11:31:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:09,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148357392] [2024-09-21 11:31:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148357392] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829092127] [2024-09-21 11:31:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:31:09,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:09,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:09,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:09,744 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:31:09,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-21 11:31:09,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:09,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 11:31:09,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-21 11:31:09,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:31:09,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829092127] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:31:09,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:31:09,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-09-21 11:31:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911472126] [2024-09-21 11:31:09,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:31:09,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:31:09,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:31:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:31:09,903 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:09,950 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-09-21 11:31:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:31:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-21 11:31:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:09,951 INFO L225 Difference]: With dead ends: 62 [2024-09-21 11:31:09,952 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 11:31:09,952 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:31:09,952 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:09,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:31:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 11:31:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-21 11:31:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2024-09-21 11:31:09,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 40 [2024-09-21 11:31:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:09,964 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2024-09-21 11:31:09,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2024-09-21 11:31:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 11:31:09,965 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:09,965 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:09,981 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:31:10,165 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:31:10,166 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:10,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1162883734, now seen corresponding path program 3 times [2024-09-21 11:31:10,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657494691] [2024-09-21 11:31:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:10,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:31:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657494691] [2024-09-21 11:31:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657494691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873517458] [2024-09-21 11:31:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:31:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:10,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:10,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:31:10,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:31:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:10,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:31:10,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-21 11:31:10,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-21 11:31:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873517458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:10,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 8] total 28 [2024-09-21 11:31:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795964654] [2024-09-21 11:31:10,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:10,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 11:31:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 11:31:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:31:10,925 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:11,493 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-21 11:31:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 11:31:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-21 11:31:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:11,495 INFO L225 Difference]: With dead ends: 86 [2024-09-21 11:31:11,495 INFO L226 Difference]: Without dead ends: 78 [2024-09-21 11:31:11,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1701, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:31:11,496 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:11,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:31:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-21 11:31:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2024-09-21 11:31:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-09-21 11:31:11,513 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2024-09-21 11:31:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:11,514 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-09-21 11:31:11,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:11,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-09-21 11:31:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-21 11:31:11,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:11,519 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:11,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:31:11,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:11,720 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:11,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1544679510, now seen corresponding path program 4 times [2024-09-21 11:31:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:11,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209107065] [2024-09-21 11:31:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:11,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:12,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 11:31:12,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:12,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209107065] [2024-09-21 11:31:12,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209107065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:12,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806322171] [2024-09-21 11:31:12,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:31:12,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:12,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:12,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:31:12,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:31:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:12,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-21 11:31:12,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 11:31:12,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 11:31:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806322171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:12,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:12,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-21 11:31:12,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083823704] [2024-09-21 11:31:12,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:12,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-21 11:31:12,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-21 11:31:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=938, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:31:12,665 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:31:32,778 INFO L93 Difference]: Finished difference Result 150 states and 176 transitions. [2024-09-21 11:31:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-21 11:31:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2024-09-21 11:31:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:31:32,780 INFO L225 Difference]: With dead ends: 150 [2024-09-21 11:31:32,780 INFO L226 Difference]: Without dead ends: 128 [2024-09-21 11:31:32,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=986, Invalid=1770, Unknown=0, NotChecked=0, Total=2756 [2024-09-21 11:31:32,781 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:31:32,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 129 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:31:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-21 11:31:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2024-09-21 11:31:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2024-09-21 11:31:32,826 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 73 [2024-09-21 11:31:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:31:32,827 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2024-09-21 11:31:32,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:32,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2024-09-21 11:31:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-21 11:31:32,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:31:32,828 INFO L216 NwaCegarLoop]: trace histogram [39, 39, 34, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:31:32,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 11:31:33,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:33,032 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:31:33,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:31:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2055405078, now seen corresponding path program 5 times [2024-09-21 11:31:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:31:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941005938] [2024-09-21 11:31:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:31:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:31:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:33,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:31:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:31:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 485 proven. 1751 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 11:31:33,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:31:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941005938] [2024-09-21 11:31:33,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941005938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:31:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920931856] [2024-09-21 11:31:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:31:33,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:31:33,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:31:33,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:31:33,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:31:34,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2024-09-21 11:31:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:31:34,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-21 11:31:34,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:31:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 293 proven. 1962 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 11:31:34,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:31:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 293 proven. 1962 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 11:31:36,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920931856] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:31:36,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:31:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 39] total 77 [2024-09-21 11:31:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824649592] [2024-09-21 11:31:36,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:31:36,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-21 11:31:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:31:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-21 11:31:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2024-09-21 11:31:36,466 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 77 states have internal predecessors, (233), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:31:43,734 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 150 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:31:55,393 WARN L293 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 146 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:32:10,956 WARN L293 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 142 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:32:31,106 WARN L293 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 138 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:33:17,207 WARN L293 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 130 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:33:47,555 WARN L293 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 126 DAG size of output: 14 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)