./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i --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 ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i -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 f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b --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-ca4ee3d-m [2024-09-20 19:07:55,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:07:55,874 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:07:55,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:07:55,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:07:55,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:07:55,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:07:55,913 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:07:55,914 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:07:55,915 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:07:55,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:07:55,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:07:55,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:07:55,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:07:55,920 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:07:55,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:07:55,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:07:55,921 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:07:55,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:07:55,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:07:55,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:07:55,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:07:55,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:07:55,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:07:55,923 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:07:55,923 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:07:55,923 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:07:55,924 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:07:55,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:07:55,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:07:55,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:07:55,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:07:55,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:55,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:07:55,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:07:55,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:07:55,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:07:55,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:07:55,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:07:55,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:07:55,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:07:55,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:07:55,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:07:56,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:07:56,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:07:56,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:07:56,189 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:07:56,189 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:07:56,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-20 19:07:57,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:07:57,777 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:07:57,777 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-20 19:07:57,784 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f95116e33/133b96513e6c40ccb5f63984af4b2dd2/FLAG892e89eb6 [2024-09-20 19:07:57,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f95116e33/133b96513e6c40ccb5f63984af4b2dd2 [2024-09-20 19:07:57,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:07:57,804 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:07:57,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:57,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:07:57,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:07:57,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:57" (1/1) ... [2024-09-20 19:07:57,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11fdfa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:57, skipping insertion in model container [2024-09-20 19:07:57,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:57" (1/1) ... [2024-09-20 19:07:57,831 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:07:57,969 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/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-20 19:07:57,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:57,991 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:07:58,004 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/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-20 19:07:58,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:58,029 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:07:58,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58 WrapperNode [2024-09-20 19:07:58,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:58,034 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:58,034 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:07:58,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:07:58,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,056 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:07:58,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:58,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:07:58,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:07:58,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:07:58,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,093 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]. [2024-09-20 19:07:58,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:07:58,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:07:58,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:07:58,111 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:07:58,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (1/1) ... [2024-09-20 19:07:58,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:58,142 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) [2024-09-20 19:07:58,147 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 [2024-09-20 19:07:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:07:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:07:58,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:07:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:07:58,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:07:58,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:07:58,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:07:58,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:07:58,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:07:58,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:07:58,251 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:07:58,253 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:07:58,409 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:07:58,409 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:07:58,467 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:07:58,469 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:07:58,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:58 BoogieIcfgContainer [2024-09-20 19:07:58,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:07:58,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:07:58,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:07:58,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:07:58,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:07:57" (1/3) ... [2024-09-20 19:07:58,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736920c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:58, skipping insertion in model container [2024-09-20 19:07:58,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:58" (2/3) ... [2024-09-20 19:07:58,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736920c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:58, skipping insertion in model container [2024-09-20 19:07:58,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:58" (3/3) ... [2024-09-20 19:07:58,480 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.i [2024-09-20 19:07:58,499 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:07:58,499 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:07:58,548 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:07:58,553 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;@6ae2d87c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:07:58,553 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:07:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 19:07:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 19:07:58,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:58,563 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:58,563 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:58,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1996614108, now seen corresponding path program 1 times [2024-09-20 19:07:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577160276] [2024-09-20 19:07:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:58,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577160276] [2024-09-20 19:07:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577160276] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:58,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:58,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 19:07:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298411979] [2024-09-20 19:07:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:58,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 19:07:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 19:07:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:58,750 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2024-09-20 19:07:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:58,806 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-09-20 19:07:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 19:07:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) Word has length 11 [2024-09-20 19:07:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:58,814 INFO L225 Difference]: With dead ends: 41 [2024-09-20 19:07:58,814 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 19:07:58,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:58,819 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:58,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 19:07:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-20 19:07:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-20 19:07:58,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-09-20 19:07:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:58,850 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-20 19:07:58,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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) [2024-09-20 19:07:58,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-20 19:07:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 19:07:58,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:58,852 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:58,852 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:07:58,852 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:58,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1251497910, now seen corresponding path program 1 times [2024-09-20 19:07:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924313972] [2024-09-20 19:07:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:58,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:58,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924313972] [2024-09-20 19:07:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924313972] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 19:07:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877916661] [2024-09-20 19:07:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:58,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:58,999 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-20 19:07:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:59,069 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-20 19:07:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) Word has length 13 [2024-09-20 19:07:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:59,071 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:07:59,071 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 19:07:59,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:59,074 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:59,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 19:07:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-20 19:07:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-20 19:07:59,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2024-09-20 19:07:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:59,088 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-20 19:07:59,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-20 19:07:59,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-20 19:07:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 19:07:59,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:59,090 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:59,091 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:07:59,091 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:59,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -239317110, now seen corresponding path program 1 times [2024-09-20 19:07:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:59,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812166991] [2024-09-20 19:07:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:59,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76917468] [2024-09-20 19:07:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:59,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:59,134 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) [2024-09-20 19:07:59,136 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:07:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:59,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:59,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:59,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:59,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:59,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812166991] [2024-09-20 19:07:59,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:59,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76917468] [2024-09-20 19:07:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76917468] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:59,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077174898] [2024-09-20 19:07:59,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:59,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:59,316 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-09-20 19:07:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:59,382 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-09-20 19:07:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2024-09-20 19:07:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:59,383 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:07:59,384 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 19:07:59,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:59,385 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:59,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 19:07:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 19:07:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:07:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-20 19:07:59,398 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-09-20 19:07:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:59,399 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-20 19:07:59,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-09-20 19:07:59,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-20 19:07:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 19:07:59,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:59,401 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:59,415 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:07:59,602 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 [2024-09-20 19:07:59,602 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:59,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 726925940, now seen corresponding path program 1 times [2024-09-20 19:07:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:59,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077333332] [2024-09-20 19:07:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:59,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:59,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:59,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:07:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:59,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:59,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077333332] [2024-09-20 19:07:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077333332] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 19:07:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872260753] [2024-09-20 19:07:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:59,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 19:07:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 19:07:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 19:07:59,905 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:59,971 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-09-20 19:07:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-20 19:07:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:59,973 INFO L225 Difference]: With dead ends: 57 [2024-09-20 19:07:59,973 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 19:07:59,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:59,974 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:59,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 19:07:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-20 19:07:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:07:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-09-20 19:07:59,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2024-09-20 19:07:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:59,991 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-09-20 19:07:59,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:59,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-09-20 19:07:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 19:07:59,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:59,993 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:59,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 19:07:59,993 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:59,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1153424271, now seen corresponding path program 1 times [2024-09-20 19:07:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:59,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488663711] [2024-09-20 19:07:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:08:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:08:00,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:08:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:08:00,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 19:08:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:08:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:08:00,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:08:00,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488663711] [2024-09-20 19:08:00,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488663711] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:08:00,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396685578] [2024-09-20 19:08:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:08:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:08:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:08:00,159 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) [2024-09-20 19:08:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:08:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:08:00,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:08:00,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:08:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:08:00,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:08:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:08:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396685578] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:08:00,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:08:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-20 19:08:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758254340] [2024-09-20 19:08:00,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:08:00,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:08:00,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:08:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:08:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:08:00,321 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:08:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:08:00,421 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-20 19:08:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:08:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-20 19:08:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:08:00,423 INFO L225 Difference]: With dead ends: 72 [2024-09-20 19:08:00,423 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:08:00,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:08:00,425 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:08:00,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:08:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:08:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-20 19:08:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:08:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-20 19:08:00,434 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2024-09-20 19:08:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:08:00,435 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-20 19:08:00,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:08:00,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:08:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-20 19:08:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 19:08:00,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:08:00,436 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:08:00,452 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:08:00,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:08:00,637 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:08:00,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:08:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504499, now seen corresponding path program 1 times [2024-09-20 19:08:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:08:00,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923592926] [2024-09-20 19:08:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:08:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:08:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:08:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798360011] [2024-09-20 19:08:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:08:00,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:08:00,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:08:00,673 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) [2024-09-20 19:08:00,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:08:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:08:00,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 19:08:00,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:08:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:08:01,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:08:28,745 WARN L293 SmtUtils]: Spent 16.11s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 19:08:32,758 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ 1 (mod c_main_~r~0 4294967296))))) is different from true [2024-09-20 19:08:58,657 WARN L293 SmtUtils]: Spent 17.09s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 19:09:22,774 WARN L293 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 19:09:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-09-20 19:09:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:09:22,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923592926] [2024-09-20 19:09:22,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:09:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798360011] [2024-09-20 19:09:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798360011] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:09:22,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:09:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2024-09-20 19:09:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311268357] [2024-09-20 19:09:22,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:09:22,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:09:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:09:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:09:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=186, Unknown=1, NotChecked=28, Total=272 [2024-09-20 19:09:22,794 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:09:27,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:09:31,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:09:34,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:09:38,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:09:42,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:09:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:09:44,219 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-09-20 19:09:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:09:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-09-20 19:09:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:09:44,222 INFO L225 Difference]: With dead ends: 85 [2024-09-20 19:09:44,222 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 19:09:44,223 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342 [2024-09-20 19:09:44,224 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:09:44,224 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 239 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 207 Invalid, 4 Unknown, 81 Unchecked, 21.2s Time] [2024-09-20 19:09:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 19:09:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-20 19:09:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:09:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-20 19:09:44,249 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 26 [2024-09-20 19:09:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:09:44,249 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-20 19:09:44,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:09:44,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:09:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-20 19:09:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:09:44,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:09:44,252 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:09:44,259 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:09:44,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:09:44,452 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:09:44,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:09:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1306939949, now seen corresponding path program 2 times [2024-09-20 19:09:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:09:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049316215] [2024-09-20 19:09:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:09:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:09:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:09:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447429792] [2024-09-20 19:09:44,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:09:44,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:09:44,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:09:44,478 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) [2024-09-20 19:09:44,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:09:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:09:44,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:09:44,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:09:44,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:09:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:09:44,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:10:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:10:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049316215] [2024-09-20 19:10:01,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:10:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447429792] [2024-09-20 19:10:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447429792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:10:01,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:10:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-20 19:10:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415928503] [2024-09-20 19:10:01,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:10:01,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:10:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:10:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:10:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=181, Unknown=4, NotChecked=0, Total=240 [2024-09-20 19:10:01,498 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:10:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:10:01,776 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-09-20 19:10:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:10:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-09-20 19:10:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:10:01,779 INFO L225 Difference]: With dead ends: 123 [2024-09-20 19:10:01,779 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 19:10:01,780 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=61, Invalid=207, Unknown=4, NotChecked=0, Total=272 [2024-09-20 19:10:01,780 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:10:01,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:10:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 19:10:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2024-09-20 19:10:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 19:10:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-09-20 19:10:01,824 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 32 [2024-09-20 19:10:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:10:01,824 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-09-20 19:10:01,824 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:10:01,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:10:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-09-20 19:10:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 19:10:01,827 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:10:01,827 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:10:01,835 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:10:02,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:10:02,028 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:10:02,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:10:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2037540399, now seen corresponding path program 3 times [2024-09-20 19:10:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:10:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547634400] [2024-09-20 19:10:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:10:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:10:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:10:02,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:10:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:10:02,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:10:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:10:02,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 19:10:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:10:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:10:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:10:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547634400] [2024-09-20 19:10:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547634400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:10:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516475293] [2024-09-20 19:10:02,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:10:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:10:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:10:02,577 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) [2024-09-20 19:10:02,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:11:57,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:11:57,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:11:57,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:11:57,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:11:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:11:57,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:11:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:11:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516475293] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:11:57,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:11:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2024-09-20 19:11:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182784945] [2024-09-20 19:11:57,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:11:57,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:11:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:11:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:11:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:11:57,892 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:11:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:11:58,178 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2024-09-20 19:11:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:11:58,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 35 [2024-09-20 19:11:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:11:58,181 INFO L225 Difference]: With dead ends: 137 [2024-09-20 19:11:58,181 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:11:58,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:11:58,183 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:11:58,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:11:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:11:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2024-09-20 19:11:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:11:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-09-20 19:11:58,212 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 35 [2024-09-20 19:11:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:11:58,212 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-09-20 19:11:58,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:11:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:11:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-09-20 19:11:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 19:11:58,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:11:58,214 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:11:58,235 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:11:58,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 19:11:58,415 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:11:58,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:11:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash 201138440, now seen corresponding path program 2 times [2024-09-20 19:11:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:11:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442627016] [2024-09-20 19:11:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:11:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:11:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:11:58,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:11:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:11:58,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:11:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:11:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:11:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:11:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442627016] [2024-09-20 19:11:58,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442627016] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:11:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940976923] [2024-09-20 19:11:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:11:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:11:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:11:58,620 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) [2024-09-20 19:11:58,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:11:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:11:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:11:58,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 19:11:58,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:11:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:11:58,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:11:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:11:58,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940976923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:11:58,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:11:58,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-20 19:11:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095624002] [2024-09-20 19:11:58,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:11:58,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:11:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:11:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:11:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:11:58,904 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:11:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:11:59,365 INFO L93 Difference]: Finished difference Result 252 states and 292 transitions. [2024-09-20 19:11:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:11:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-09-20 19:11:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:11:59,367 INFO L225 Difference]: With dead ends: 252 [2024-09-20 19:11:59,367 INFO L226 Difference]: Without dead ends: 219 [2024-09-20 19:11:59,368 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:11:59,368 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:11:59,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:11:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-20 19:11:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 122. [2024-09-20 19:11:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 101 states have internal predecessors, (117), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:11:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2024-09-20 19:11:59,395 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 34 [2024-09-20 19:11:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:11:59,395 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2024-09-20 19:11:59,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:11:59,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:11:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2024-09-20 19:11:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 19:11:59,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:11:59,397 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:11:59,405 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:11:59,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:11:59,598 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:11:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:11:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -870169238, now seen corresponding path program 4 times [2024-09-20 19:11:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:11:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674651492] [2024-09-20 19:11:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:11:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:11:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:11:59,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986963978] [2024-09-20 19:11:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:11:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:11:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:11:59,652 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) [2024-09-20 19:11:59,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:11:59,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:11:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:11:59,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 19:11:59,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:12:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:12:00,413 INFO L327 TraceCheckSpWp]: Computing backward predicates...