./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/egcd3-ll_valuebound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:32:53,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:32:53,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:32:53,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:32:53,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:32:53,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:32:53,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:32:53,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:32:53,805 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:32:53,807 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:32:53,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:32:53,808 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:32:53,808 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:32:53,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:32:53,810 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:32:53,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:32:53,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:32:53,811 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:32:53,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:32:53,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:32:53,811 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:32:53,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:32:53,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:32:53,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:32:53,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:32:53,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:32:53,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:32:53,816 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:32:53,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:32:53,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:32:53,817 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:32:53,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:32:53,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:32:53,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:32:53,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:32:53,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:32:53,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:32:53,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:32:53,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:32:53,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:32:53,820 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:32:53,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:32:53,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:32:54,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:32:54,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:32:54,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:32:54,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:32:54,112 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:32:54,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2024-09-13 00:32:55,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:32:55,664 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:32:55,664 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2024-09-13 00:32:55,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2ac6c44cb/5d176317a32f4224a6f15542211b24a7/FLAG0136a056f [2024-09-13 00:32:56,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2ac6c44cb/5d176317a32f4224a6f15542211b24a7 [2024-09-13 00:32:56,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:32:56,069 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:32:56,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:32:56,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:32:56,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:32:56,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf2c4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56, skipping insertion in model container [2024-09-13 00:32:56,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,100 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:32:56,232 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2024-09-13 00:32:56,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:32:56,257 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:32:56,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2024-09-13 00:32:56,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:32:56,288 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:32:56,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56 WrapperNode [2024-09-13 00:32:56,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:32:56,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:32:56,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:32:56,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:32:56,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,309 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:32:56,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:32:56,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:32:56,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:32:56,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:32:56,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,321 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,333 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]. [2024-09-13 00:32:56,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,341 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,342 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:32:56,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:32:56,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:32:56,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:32:56,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (1/1) ... [2024-09-13 00:32:56,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:32:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:56,391 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) [2024-09-13 00:32:56,396 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 [2024-09-13 00:32:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:32:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:32:56,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:32:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:32:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:32:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:32:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:32:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:32:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:32:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:32:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:32:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:32:56,502 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:32:56,504 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:32:56,667 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 00:32:56,667 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:32:56,685 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:32:56,685 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 00:32:56,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:32:56 BoogieIcfgContainer [2024-09-13 00:32:56,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:32:56,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:32:56,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:32:56,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:32:56,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:32:56" (1/3) ... [2024-09-13 00:32:56,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e167bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:32:56, skipping insertion in model container [2024-09-13 00:32:56,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:32:56" (2/3) ... [2024-09-13 00:32:56,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e167bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:32:56, skipping insertion in model container [2024-09-13 00:32:56,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:32:56" (3/3) ... [2024-09-13 00:32:56,701 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2024-09-13 00:32:56,715 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:32:56,715 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:32:56,763 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:32:56,770 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;@41a4b5a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:32:56,770 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:32:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 00:32:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 00:32:56,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:56,782 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:56,782 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:56,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-13 00:32:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605361706] [2024-09-13 00:32:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:32:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:32:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:32:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:32:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:32:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:32:56,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605361706] [2024-09-13 00:32:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605361706] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:32:57,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:32:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:32:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254523373] [2024-09-13 00:32:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:32:57,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:32:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:32:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:32:57,039 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 00:32:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:57,069 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-13 00:32:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:32:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-13 00:32:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:57,079 INFO L225 Difference]: With dead ends: 70 [2024-09-13 00:32:57,080 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 00:32:57,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:32:57,085 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:57,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:32:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 00:32:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 00:32:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 00:32:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-13 00:32:57,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-13 00:32:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:57,122 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-13 00:32:57,122 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 00:32:57,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-13 00:32:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 00:32:57,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:57,125 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:57,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:32:57,126 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:57,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-13 00:32:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616473154] [2024-09-13 00:32:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:57,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:32:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:32:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:32:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:32:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:32:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 00:32:57,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616473154] [2024-09-13 00:32:57,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616473154] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:32:57,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:32:57,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 00:32:57,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421143270] [2024-09-13 00:32:57,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:32:57,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:32:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:32:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:32:57,444 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 00:32:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:57,569 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-13 00:32:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:32:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-13 00:32:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:57,571 INFO L225 Difference]: With dead ends: 53 [2024-09-13 00:32:57,571 INFO L226 Difference]: Without dead ends: 46 [2024-09-13 00:32:57,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:32:57,573 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:57,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:32:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-13 00:32:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-13 00:32:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 00:32:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-13 00:32:57,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-13 00:32:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:57,597 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-13 00:32:57,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 00:32:57,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-13 00:32:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 00:32:57,599 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:57,599 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:57,600 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 00:32:57,600 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:57,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-13 00:32:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:57,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292932542] [2024-09-13 00:32:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:57,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773495803] [2024-09-13 00:32:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:57,639 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) [2024-09-13 00:32:57,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:32:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:57,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:32:57,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:32:57,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:32:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292932542] [2024-09-13 00:32:57,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:57,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773495803] [2024-09-13 00:32:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773495803] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:32:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:32:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:32:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486944976] [2024-09-13 00:32:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:32:57,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:32:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:32:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:32:57,874 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 00:32:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:57,945 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-13 00:32:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:32:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-13 00:32:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:57,949 INFO L225 Difference]: With dead ends: 52 [2024-09-13 00:32:57,950 INFO L226 Difference]: Without dead ends: 50 [2024-09-13 00:32:57,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:32:57,951 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:57,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:32:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-13 00:32:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-13 00:32:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-13 00:32:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-13 00:32:57,968 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-13 00:32:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:57,969 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-13 00:32:57,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 00:32:57,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-13 00:32:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 00:32:57,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:57,971 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:57,985 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:32:58,175 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 [2024-09-13 00:32:58,176 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:58,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-13 00:32:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:58,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815464109] [2024-09-13 00:32:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:32:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:32:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:32:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:32:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:32:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 00:32:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815464109] [2024-09-13 00:32:58,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815464109] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922711528] [2024-09-13 00:32:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:58,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:58,346 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) [2024-09-13 00:32:58,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:32:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:58,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:32:58,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 00:32:58,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 00:32:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922711528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:32:58,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:32:58,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 00:32:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912483930] [2024-09-13 00:32:58,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:58,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 00:32:58,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 00:32:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:32:58,549 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 00:32:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:58,758 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-13 00:32:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:32:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-13 00:32:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:58,762 INFO L225 Difference]: With dead ends: 102 [2024-09-13 00:32:58,762 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 00:32:58,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:32:58,766 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:58,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:32:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 00:32:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-13 00:32:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 00:32:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-13 00:32:58,792 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-13 00:32:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:58,793 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-13 00:32:58,793 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 00:32:58,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-13 00:32:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 00:32:58,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:58,799 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:58,812 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 00:32:58,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:59,000 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:59,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-13 00:32:59,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:59,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371967079] [2024-09-13 00:32:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:59,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831547281] [2024-09-13 00:32:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:59,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:59,015 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) [2024-09-13 00:32:59,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:32:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:59,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:32:59,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:32:59,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:32:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371967079] [2024-09-13 00:32:59,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831547281] [2024-09-13 00:32:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831547281] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:32:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:32:59,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:32:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140339428] [2024-09-13 00:32:59,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:32:59,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:32:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:32:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:32:59,155 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:32:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:59,223 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-13 00:32:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:32:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-13 00:32:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:59,227 INFO L225 Difference]: With dead ends: 78 [2024-09-13 00:32:59,227 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 00:32:59,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:32:59,230 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:59,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:32:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 00:32:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-13 00:32:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 00:32:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-13 00:32:59,250 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-13 00:32:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:59,250 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-13 00:32:59,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:32:59,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-13 00:32:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 00:32:59,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:59,252 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:59,269 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:32:59,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:59,453 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:59,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-13 00:32:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:59,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033663876] [2024-09-13 00:32:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:59,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:59,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018514510] [2024-09-13 00:32:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:59,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:59,483 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) [2024-09-13 00:32:59,489 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:32:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:59,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 00:32:59,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 00:32:59,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:33:00,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:00,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033663876] [2024-09-13 00:33:00,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:00,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018514510] [2024-09-13 00:33:00,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018514510] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:00,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:00,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-13 00:33:00,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100556749] [2024-09-13 00:33:00,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:00,130 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:33:00,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:00,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:33:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 00:33:00,131 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:33:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:01,491 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-13 00:33:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:33:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-13 00:33:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:01,493 INFO L225 Difference]: With dead ends: 132 [2024-09-13 00:33:01,493 INFO L226 Difference]: Without dead ends: 130 [2024-09-13 00:33:01,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:33:01,494 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:01,494 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 00:33:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-13 00:33:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-13 00:33:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-13 00:33:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-13 00:33:01,535 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-13 00:33:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:01,536 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-13 00:33:01,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:33:01,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-13 00:33:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 00:33:01,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:01,538 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:01,556 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:01,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:01,739 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:01,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-13 00:33:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:01,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520191416] [2024-09-13 00:33:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666085756] [2024-09-13 00:33:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:01,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:01,753 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) [2024-09-13 00:33:01,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:33:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:01,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:33:01,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 00:33:01,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:33:01,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:01,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520191416] [2024-09-13 00:33:01,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:01,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666085756] [2024-09-13 00:33:01,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666085756] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:33:01,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:33:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:33:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542513161] [2024-09-13 00:33:01,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:33:01,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:33:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:01,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:33:01,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:33:01,851 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:33:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:01,933 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-13 00:33:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:33:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-13 00:33:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:01,936 INFO L225 Difference]: With dead ends: 155 [2024-09-13 00:33:01,936 INFO L226 Difference]: Without dead ends: 153 [2024-09-13 00:33:01,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:33:01,937 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:01,937 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:33:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-13 00:33:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-13 00:33:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-13 00:33:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-13 00:33:01,978 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-13 00:33:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:01,978 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-13 00:33:01,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:33:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-13 00:33:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 00:33:01,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:01,980 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:01,998 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:02,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 00:33:02,181 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:02,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-13 00:33:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:02,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736791290] [2024-09-13 00:33:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:02,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418936291] [2024-09-13 00:33:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:02,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:02,195 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) [2024-09-13 00:33:02,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:33:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:02,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 00:33:02,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:33:02,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736791290] [2024-09-13 00:33:02,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418936291] [2024-09-13 00:33:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418936291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:02,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:02,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-13 00:33:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408718890] [2024-09-13 00:33:02,446 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:02,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:33:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:33:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:33:02,447 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:33:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:02,633 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-13 00:33:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 00:33:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-13 00:33:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:02,636 INFO L225 Difference]: With dead ends: 174 [2024-09-13 00:33:02,636 INFO L226 Difference]: Without dead ends: 172 [2024-09-13 00:33:02,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-13 00:33:02,637 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:02,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:33:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-13 00:33:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-13 00:33:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 00:33:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-13 00:33:02,694 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-13 00:33:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:02,695 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-13 00:33:02,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:33:02,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-13 00:33:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 00:33:02,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:02,696 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:02,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 00:33:02,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:02,897 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:02,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-13 00:33:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034190320] [2024-09-13 00:33:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:02,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:02,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943768073] [2024-09-13 00:33:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:02,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:02,911 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) [2024-09-13 00:33:02,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:33:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:02,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:33:02,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 00:33:02,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:33:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034190320] [2024-09-13 00:33:02,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943768073] [2024-09-13 00:33:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943768073] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:33:02,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:33:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:33:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041122851] [2024-09-13 00:33:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:33:02,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:33:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:33:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:33:03,001 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:33:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:03,145 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-13 00:33:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:33:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-13 00:33:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:03,148 INFO L225 Difference]: With dead ends: 254 [2024-09-13 00:33:03,148 INFO L226 Difference]: Without dead ends: 252 [2024-09-13 00:33:03,149 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:33:03,149 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:03,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:33:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-13 00:33:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-13 00:33:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-13 00:33:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-13 00:33:03,239 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-13 00:33:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:03,239 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-13 00:33:03,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:33:03,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-13 00:33:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 00:33:03,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:03,241 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:03,258 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:03,445 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:03,446 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:03,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-13 00:33:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070878474] [2024-09-13 00:33:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:33:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:33:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:33:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:33:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:33:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 00:33:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 00:33:03,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:03,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070878474] [2024-09-13 00:33:03,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070878474] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:33:03,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:33:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:33:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189213665] [2024-09-13 00:33:03,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:33:03,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:33:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:33:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:33:03,514 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:33:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:03,644 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-13 00:33:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:33:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-13 00:33:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:03,648 INFO L225 Difference]: With dead ends: 291 [2024-09-13 00:33:03,648 INFO L226 Difference]: Without dead ends: 177 [2024-09-13 00:33:03,651 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:33:03,651 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:03,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:33:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-13 00:33:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-13 00:33:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-13 00:33:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-13 00:33:03,711 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-13 00:33:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:03,711 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-13 00:33:03,711 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 00:33:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-13 00:33:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 00:33:03,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:03,713 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:03,713 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-13 00:33:03,713 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:03,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-13 00:33:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495600665] [2024-09-13 00:33:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040681156] [2024-09-13 00:33:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:03,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:03,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:33:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:03,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 00:33:03,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 00:33:04,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 00:33:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495600665] [2024-09-13 00:33:05,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040681156] [2024-09-13 00:33:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040681156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:05,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-13 00:33:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716678766] [2024-09-13 00:33:05,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:05,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:33:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:33:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-13 00:33:05,787 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-13 00:33:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:10,437 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-13 00:33:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 00:33:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-13 00:33:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:10,441 INFO L225 Difference]: With dead ends: 393 [2024-09-13 00:33:10,442 INFO L226 Difference]: Without dead ends: 385 [2024-09-13 00:33:10,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 00:33:10,443 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:10,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-13 00:33:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-13 00:33:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-13 00:33:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-13 00:33:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-13 00:33:10,555 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-13 00:33:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:10,556 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-13 00:33:10,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-13 00:33:10,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-13 00:33:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 00:33:10,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:10,558 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:10,571 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 00:33:10,761 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:10,761 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:10,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-13 00:33:10,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:10,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759513738] [2024-09-13 00:33:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:33:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:33:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:33:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:33:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:33:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:33:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 00:33:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 00:33:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 00:33:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-13 00:33:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 00:33:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:33:10,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759513738] [2024-09-13 00:33:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759513738] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:33:10,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:33:10,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:33:10,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547614900] [2024-09-13 00:33:10,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:33:10,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:33:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:10,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:33:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:33:10,860 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 00:33:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:11,043 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-13 00:33:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:33:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-13 00:33:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:11,046 INFO L225 Difference]: With dead ends: 399 [2024-09-13 00:33:11,047 INFO L226 Difference]: Without dead ends: 243 [2024-09-13 00:33:11,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:33:11,049 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:11,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:33:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-13 00:33:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-13 00:33:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 00:33:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-13 00:33:11,165 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-13 00:33:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:11,165 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-13 00:33:11,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 00:33:11,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-13 00:33:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 00:33:11,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:11,167 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:11,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 00:33:11,167 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:11,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-13 00:33:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:11,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699836364] [2024-09-13 00:33:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:11,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72261312] [2024-09-13 00:33:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:11,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:11,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:11,183 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:11,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:33:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:11,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 00:33:11,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-13 00:33:11,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 00:33:11,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:11,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699836364] [2024-09-13 00:33:11,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:11,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72261312] [2024-09-13 00:33:11,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72261312] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:11,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:11,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-13 00:33:11,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938115863] [2024-09-13 00:33:11,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:33:11,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:33:11,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:11,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:33:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:33:11,371 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 00:33:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:11,520 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-13 00:33:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:33:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-13 00:33:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:11,523 INFO L225 Difference]: With dead ends: 234 [2024-09-13 00:33:11,523 INFO L226 Difference]: Without dead ends: 232 [2024-09-13 00:33:11,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:33:11,524 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:11,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:33:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-13 00:33:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-13 00:33:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 00:33:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-13 00:33:11,621 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-13 00:33:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:11,621 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-13 00:33:11,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 00:33:11,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-13 00:33:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 00:33:11,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:11,623 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:11,637 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:11,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 00:33:11,824 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:11,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-13 00:33:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118614068] [2024-09-13 00:33:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:11,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115107250] [2024-09-13 00:33:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:11,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:11,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 00:33:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:11,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 00:33:11,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 00:33:12,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 00:33:13,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:13,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118614068] [2024-09-13 00:33:13,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115107250] [2024-09-13 00:33:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115107250] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:13,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:13,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-13 00:33:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285733250] [2024-09-13 00:33:13,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:13,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:33:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:33:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-13 00:33:13,153 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 00:33:19,361 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 [] [2024-09-13 00:33:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:22,143 INFO L93 Difference]: Finished difference Result 385 states and 560 transitions. [2024-09-13 00:33:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 00:33:22,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-13 00:33:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:22,146 INFO L225 Difference]: With dead ends: 385 [2024-09-13 00:33:22,146 INFO L226 Difference]: Without dead ends: 383 [2024-09-13 00:33:22,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2024-09-13 00:33:22,148 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:22,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 447 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 585 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-09-13 00:33:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-13 00:33:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2024-09-13 00:33:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 197 states have (on average 1.2233502538071066) internal successors, (241), 198 states have internal predecessors, (241), 127 states have call successors, (127), 15 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2024-09-13 00:33:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 493 transitions. [2024-09-13 00:33:22,317 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 493 transitions. Word has length 71 [2024-09-13 00:33:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:22,317 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 493 transitions. [2024-09-13 00:33:22,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 00:33:22,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 493 transitions. [2024-09-13 00:33:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 00:33:22,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:22,319 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:22,337 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 00:33:22,523 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 00:33:22,524 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:22,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-13 00:33:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:22,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332585144] [2024-09-13 00:33:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:22,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158831550] [2024-09-13 00:33:22,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:22,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:22,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:22,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:22,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 00:33:22,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:22,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:22,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:33:22,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-13 00:33:22,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-13 00:33:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332585144] [2024-09-13 00:33:22,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158831550] [2024-09-13 00:33:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158831550] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:22,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-13 00:33:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829236576] [2024-09-13 00:33:22,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:22,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:33:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:33:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-13 00:33:22,898 INFO L87 Difference]: Start difference. First operand 339 states and 493 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 00:33:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:23,666 INFO L93 Difference]: Finished difference Result 436 states and 631 transitions. [2024-09-13 00:33:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 00:33:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-13 00:33:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:23,678 INFO L225 Difference]: With dead ends: 436 [2024-09-13 00:33:23,679 INFO L226 Difference]: Without dead ends: 434 [2024-09-13 00:33:23,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:33:23,681 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:23,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 361 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:33:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-09-13 00:33:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2024-09-13 00:33:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 241 states have (on average 1.2282157676348548) internal successors, (296), 242 states have internal predecessors, (296), 159 states have call successors, (159), 17 states have call predecessors, (159), 16 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-13 00:33:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 612 transitions. [2024-09-13 00:33:23,913 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 612 transitions. Word has length 71 [2024-09-13 00:33:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:23,914 INFO L474 AbstractCegarLoop]: Abstraction has 417 states and 612 transitions. [2024-09-13 00:33:23,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 00:33:23,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 612 transitions. [2024-09-13 00:33:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-13 00:33:23,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:23,915 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:23,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 00:33:24,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 00:33:24,120 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:24,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-13 00:33:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:24,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093903532] [2024-09-13 00:33:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464428199] [2024-09-13 00:33:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:24,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:24,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:24,145 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:24,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 00:33:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:24,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 00:33:24,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-13 00:33:24,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-13 00:33:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093903532] [2024-09-13 00:33:26,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464428199] [2024-09-13 00:33:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464428199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:26,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-13 00:33:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133505644] [2024-09-13 00:33:26,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:26,761 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:33:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:33:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:33:26,762 INFO L87 Difference]: Start difference. First operand 417 states and 612 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-13 00:33:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:32,049 INFO L93 Difference]: Finished difference Result 558 states and 820 transitions. [2024-09-13 00:33:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-13 00:33:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-13 00:33:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:32,053 INFO L225 Difference]: With dead ends: 558 [2024-09-13 00:33:32,053 INFO L226 Difference]: Without dead ends: 554 [2024-09-13 00:33:32,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 00:33:32,055 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 217 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:32,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 536 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-13 00:33:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-09-13 00:33:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 540. [2024-09-13 00:33:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 312 states have (on average 1.233974358974359) internal successors, (385), 313 states have internal predecessors, (385), 207 states have call successors, (207), 21 states have call predecessors, (207), 20 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-13 00:33:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 797 transitions. [2024-09-13 00:33:32,423 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 797 transitions. Word has length 85 [2024-09-13 00:33:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:32,424 INFO L474 AbstractCegarLoop]: Abstraction has 540 states and 797 transitions. [2024-09-13 00:33:32,424 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-13 00:33:32,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 797 transitions. [2024-09-13 00:33:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 00:33:32,425 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:32,425 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:32,443 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 00:33:32,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 00:33:32,626 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:32,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-13 00:33:32,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:32,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151973642] [2024-09-13 00:33:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:32,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748062450] [2024-09-13 00:33:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:32,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:32,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:32,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:32,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 00:33:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:32,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 00:33:32,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-13 00:33:32,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-13 00:33:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151973642] [2024-09-13 00:33:33,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748062450] [2024-09-13 00:33:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748062450] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:33,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 00:33:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744136531] [2024-09-13 00:33:33,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:33,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:33:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:33:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:33:33,267 INFO L87 Difference]: Start difference. First operand 540 states and 797 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:33:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:35,158 INFO L93 Difference]: Finished difference Result 1241 states and 1983 transitions. [2024-09-13 00:33:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:33:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-13 00:33:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:35,166 INFO L225 Difference]: With dead ends: 1241 [2024-09-13 00:33:35,166 INFO L226 Difference]: Without dead ends: 1239 [2024-09-13 00:33:35,167 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:33:35,168 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 153 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:35,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 375 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:33:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2024-09-13 00:33:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1170. [2024-09-13 00:33:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 563 states have (on average 1.3285968028419184) internal successors, (748), 564 states have internal predecessors, (748), 583 states have call successors, (583), 24 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-13 00:33:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1912 transitions. [2024-09-13 00:33:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1912 transitions. Word has length 98 [2024-09-13 00:33:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:36,101 INFO L474 AbstractCegarLoop]: Abstraction has 1170 states and 1912 transitions. [2024-09-13 00:33:36,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:33:36,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1912 transitions. [2024-09-13 00:33:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-13 00:33:36,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:36,105 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:36,119 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:36,305 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 00:33:36,305 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:36,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-13 00:33:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324773652] [2024-09-13 00:33:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:36,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090601058] [2024-09-13 00:33:36,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:33:36,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:36,323 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:36,325 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 00:33:36,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:33:36,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:36,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:33:36,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-13 00:33:36,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-13 00:33:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324773652] [2024-09-13 00:33:37,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090601058] [2024-09-13 00:33:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090601058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:37,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-13 00:33:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125816308] [2024-09-13 00:33:37,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:37,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:33:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:33:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-13 00:33:37,106 INFO L87 Difference]: Start difference. First operand 1170 states and 1912 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-13 00:33:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:39,649 INFO L93 Difference]: Finished difference Result 1369 states and 2252 transitions. [2024-09-13 00:33:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 00:33:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-13 00:33:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:39,658 INFO L225 Difference]: With dead ends: 1369 [2024-09-13 00:33:39,658 INFO L226 Difference]: Without dead ends: 1365 [2024-09-13 00:33:39,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-13 00:33:39,659 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:39,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 485 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 00:33:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2024-09-13 00:33:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1172. [2024-09-13 00:33:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 565 states have (on average 1.3256637168141594) internal successors, (749), 565 states have internal predecessors, (749), 583 states have call successors, (583), 25 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-13 00:33:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1913 transitions. [2024-09-13 00:33:40,816 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1913 transitions. Word has length 96 [2024-09-13 00:33:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:40,817 INFO L474 AbstractCegarLoop]: Abstraction has 1172 states and 1913 transitions. [2024-09-13 00:33:40,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-13 00:33:40,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1913 transitions. [2024-09-13 00:33:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 00:33:40,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:40,819 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:40,826 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 00:33:41,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 00:33:41,020 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:41,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-13 00:33:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:41,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271945600] [2024-09-13 00:33:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:33:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:33:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:33:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:33:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:33:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 00:33:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 00:33:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 00:33:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 00:33:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 00:33:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-13 00:33:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-13 00:33:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-13 00:33:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 00:33:41,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:41,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271945600] [2024-09-13 00:33:41,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271945600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:41,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948300904] [2024-09-13 00:33:41,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:41,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:41,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:41,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 00:33:41,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:41,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 00:33:41,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 00:33:41,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 00:33:41,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948300904] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:41,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:33:41,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-13 00:33:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814471043] [2024-09-13 00:33:41,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:41,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:33:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:33:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-13 00:33:41,443 INFO L87 Difference]: Start difference. First operand 1172 states and 1913 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 00:33:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:43,118 INFO L93 Difference]: Finished difference Result 1305 states and 2119 transitions. [2024-09-13 00:33:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:33:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-13 00:33:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:43,128 INFO L225 Difference]: With dead ends: 1305 [2024-09-13 00:33:43,128 INFO L226 Difference]: Without dead ends: 1300 [2024-09-13 00:33:43,129 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:33:43,129 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:43,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 413 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:33:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-09-13 00:33:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1166. [2024-09-13 00:33:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 559 states have (on average 1.3273703041144902) internal successors, (742), 559 states have internal predecessors, (742), 583 states have call successors, (583), 25 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-13 00:33:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1906 transitions. [2024-09-13 00:33:44,442 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1906 transitions. Word has length 98 [2024-09-13 00:33:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:44,443 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1906 transitions. [2024-09-13 00:33:44,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 00:33:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1906 transitions. [2024-09-13 00:33:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-13 00:33:44,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:44,445 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:44,452 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:44,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:44,650 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:44,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-13 00:33:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436086370] [2024-09-13 00:33:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406655254] [2024-09-13 00:33:44,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:44,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:44,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:44,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 00:33:44,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:44,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-13 00:33:44,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-13 00:33:45,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-13 00:33:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436086370] [2024-09-13 00:33:48,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406655254] [2024-09-13 00:33:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406655254] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:48,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:48,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-13 00:33:48,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918072331] [2024-09-13 00:33:48,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:48,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 00:33:48,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 00:33:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:33:48,306 INFO L87 Difference]: Start difference. First operand 1166 states and 1906 transitions. Second operand has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-13 00:34:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:04,136 INFO L93 Difference]: Finished difference Result 1456 states and 2338 transitions. [2024-09-13 00:34:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-13 00:34:04,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 112 [2024-09-13 00:34:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:04,144 INFO L225 Difference]: With dead ends: 1456 [2024-09-13 00:34:04,145 INFO L226 Difference]: Without dead ends: 1450 [2024-09-13 00:34:04,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1349, Invalid=5293, Unknown=0, NotChecked=0, Total=6642 [2024-09-13 00:34:04,147 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 266 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:04,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 963 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-13 00:34:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2024-09-13 00:34:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1393. [2024-09-13 00:34:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 687 states have (on average 1.3202328966521106) internal successors, (907), 687 states have internal predecessors, (907), 675 states have call successors, (675), 32 states have call predecessors, (675), 30 states have return successors, (673), 673 states have call predecessors, (673), 673 states have call successors, (673) [2024-09-13 00:34:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2255 transitions. [2024-09-13 00:34:06,014 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2255 transitions. Word has length 112 [2024-09-13 00:34:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:06,015 INFO L474 AbstractCegarLoop]: Abstraction has 1393 states and 2255 transitions. [2024-09-13 00:34:06,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-13 00:34:06,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2255 transitions. [2024-09-13 00:34:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-13 00:34:06,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:06,018 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:06,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 00:34:06,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:06,218 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:06,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-13 00:34:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:06,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114981552] [2024-09-13 00:34:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:06,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:06,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763204437] [2024-09-13 00:34:06,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:34:06,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:06,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:06,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:06,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 00:34:06,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 00:34:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:06,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-13 00:34:06,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-13 00:34:07,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-13 00:34:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114981552] [2024-09-13 00:34:10,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763204437] [2024-09-13 00:34:10,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763204437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:34:10,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:34:10,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-13 00:34:10,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514405886] [2024-09-13 00:34:10,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:10,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 00:34:10,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 00:34:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:34:10,238 INFO L87 Difference]: Start difference. First operand 1393 states and 2255 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-13 00:34:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:25,649 INFO L93 Difference]: Finished difference Result 1694 states and 2726 transitions. [2024-09-13 00:34:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-13 00:34:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-13 00:34:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:25,660 INFO L225 Difference]: With dead ends: 1694 [2024-09-13 00:34:25,661 INFO L226 Difference]: Without dead ends: 1688 [2024-09-13 00:34:25,664 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1724, Invalid=8376, Unknown=0, NotChecked=0, Total=10100 [2024-09-13 00:34:25,665 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 371 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:25,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 907 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-13 00:34:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2024-09-13 00:34:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1543. [2024-09-13 00:34:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 763 states have (on average 1.3211009174311927) internal successors, (1008), 763 states have internal predecessors, (1008), 747 states have call successors, (747), 34 states have call predecessors, (747), 32 states have return successors, (745), 745 states have call predecessors, (745), 745 states have call successors, (745) [2024-09-13 00:34:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2500 transitions. [2024-09-13 00:34:28,034 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2500 transitions. Word has length 115 [2024-09-13 00:34:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:28,034 INFO L474 AbstractCegarLoop]: Abstraction has 1543 states and 2500 transitions. [2024-09-13 00:34:28,035 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-13 00:34:28,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2500 transitions. [2024-09-13 00:34:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-13 00:34:28,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:28,037 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:28,043 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 00:34:28,237 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:28,237 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-13 00:34:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715592836] [2024-09-13 00:34:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:28,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372480768] [2024-09-13 00:34:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:34:28,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:28,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 00:34:28,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:34:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:28,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-13 00:34:28,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-13 00:34:29,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715592836] [2024-09-13 00:34:30,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372480768] [2024-09-13 00:34:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372480768] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:34:30,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:34:30,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 00:34:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326510761] [2024-09-13 00:34:30,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:30,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:34:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:34:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:34:30,872 INFO L87 Difference]: Start difference. First operand 1543 states and 2500 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 00:34:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:34,699 INFO L93 Difference]: Finished difference Result 1679 states and 2705 transitions. [2024-09-13 00:34:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:34:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-13 00:34:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:34,746 INFO L225 Difference]: With dead ends: 1679 [2024-09-13 00:34:34,746 INFO L226 Difference]: Without dead ends: 1674 [2024-09-13 00:34:34,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 00:34:34,750 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 87 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:34,750 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 610 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:34:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2024-09-13 00:34:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1657. [2024-09-13 00:34:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 817 states have (on average 1.3206854345165238) internal successors, (1079), 817 states have internal predecessors, (1079), 803 states have call successors, (803), 38 states have call predecessors, (803), 36 states have return successors, (801), 801 states have call predecessors, (801), 801 states have call successors, (801) [2024-09-13 00:34:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2683 transitions. [2024-09-13 00:34:37,327 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2683 transitions. Word has length 115 [2024-09-13 00:34:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:37,328 INFO L474 AbstractCegarLoop]: Abstraction has 1657 states and 2683 transitions. [2024-09-13 00:34:37,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 00:34:37,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2683 transitions. [2024-09-13 00:34:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 00:34:37,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:37,330 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:37,342 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 00:34:37,530 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 00:34:37,531 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:37,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-13 00:34:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:37,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503793977] [2024-09-13 00:34:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:37,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:37,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734638624] [2024-09-13 00:34:37,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:34:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:37,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:37,550 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 00:34:37,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 00:34:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:37,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-13 00:34:37,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-13 00:34:38,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-13 00:34:42,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503793977] [2024-09-13 00:34:42,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734638624] [2024-09-13 00:34:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734638624] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:34:42,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:34:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-09-13 00:34:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665982200] [2024-09-13 00:34:42,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:42,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 00:34:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 00:34:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:34:42,851 INFO L87 Difference]: Start difference. First operand 1657 states and 2683 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-13 00:35:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:27,498 INFO L93 Difference]: Finished difference Result 2425 states and 3907 transitions. [2024-09-13 00:35:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-09-13 00:35:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-09-13 00:35:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:27,510 INFO L225 Difference]: With dead ends: 2425 [2024-09-13 00:35:27,510 INFO L226 Difference]: Without dead ends: 2419 [2024-09-13 00:35:27,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5529 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=3568, Invalid=14791, Unknown=1, NotChecked=0, Total=18360 [2024-09-13 00:35:27,516 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 444 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:27,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1344 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-09-13 00:35:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2024-09-13 00:35:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1905. [2024-09-13 00:35:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 962 states have (on average 1.3056133056133057) internal successors, (1256), 962 states have internal predecessors, (1256), 899 states have call successors, (899), 45 states have call predecessors, (899), 43 states have return successors, (897), 897 states have call predecessors, (897), 897 states have call successors, (897) [2024-09-13 00:35:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3052 transitions. [2024-09-13 00:35:31,448 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3052 transitions. Word has length 120 [2024-09-13 00:35:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:31,448 INFO L474 AbstractCegarLoop]: Abstraction has 1905 states and 3052 transitions. [2024-09-13 00:35:31,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-13 00:35:31,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3052 transitions. [2024-09-13 00:35:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-13 00:35:31,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:31,452 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:31,460 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:31,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-13 00:35:31,657 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-13 00:35:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271005543] [2024-09-13 00:35:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067226924] [2024-09-13 00:35:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:35:31,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:31,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:31,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 00:35:31,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-13 00:35:31,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:31,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 00:35:31,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-13 00:35:32,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-13 00:35:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271005543] [2024-09-13 00:35:36,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067226924] [2024-09-13 00:35:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067226924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:35:36,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:35:36,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-09-13 00:35:36,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227969542] [2024-09-13 00:35:36,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:36,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 00:35:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 00:35:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-13 00:35:36,212 INFO L87 Difference]: Start difference. First operand 1905 states and 3052 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-13 00:35:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:51,695 INFO L93 Difference]: Finished difference Result 2302 states and 3686 transitions. [2024-09-13 00:35:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-13 00:35:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-09-13 00:35:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:51,706 INFO L225 Difference]: With dead ends: 2302 [2024-09-13 00:35:51,706 INFO L226 Difference]: Without dead ends: 2296 [2024-09-13 00:35:51,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-09-13 00:35:51,708 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 211 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:51,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 792 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-13 00:35:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2024-09-13 00:35:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2119. [2024-09-13 00:35:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1065 states have (on average 1.3089201877934273) internal successors, (1394), 1065 states have internal predecessors, (1394), 1007 states have call successors, (1007), 48 states have call predecessors, (1007), 46 states have return successors, (1005), 1005 states have call predecessors, (1005), 1005 states have call successors, (1005) [2024-09-13 00:35:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3406 transitions. [2024-09-13 00:35:56,003 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3406 transitions. Word has length 132 [2024-09-13 00:35:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:56,004 INFO L474 AbstractCegarLoop]: Abstraction has 2119 states and 3406 transitions. [2024-09-13 00:35:56,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-13 00:35:56,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3406 transitions. [2024-09-13 00:35:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-13 00:35:56,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:56,008 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:56,026 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:56,208 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 00:35:56,209 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:56,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-09-13 00:35:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:56,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134281863] [2024-09-13 00:35:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480860982] [2024-09-13 00:35:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:35:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:56,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:56,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 00:35:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:35:56,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-13 00:35:56,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 76 proven. 76 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-13 00:35:57,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-13 00:36:02,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134281863] [2024-09-13 00:36:02,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480860982] [2024-09-13 00:36:02,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480860982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:36:02,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:36:02,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 41 [2024-09-13 00:36:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536375944] [2024-09-13 00:36:02,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:02,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 00:36:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 00:36:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 00:36:02,140 INFO L87 Difference]: Start difference. First operand 2119 states and 3406 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-13 00:36:16,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:36:18,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:36:32,517 WARN L293 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 120 DAG size of output: 116 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:36:36,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:36:43,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:37:00,444 WARN L293 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:37:08,553 WARN L293 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:37:15,320 WARN L293 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:37:18,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:37:26,809 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:38:11,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:16,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:32,338 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 116 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:38:36,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:48,031 WARN L293 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 115 DAG size of output: 110 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:39:33,303 WARN L293 SmtUtils]: Spent 9.92s on a formula simplification. DAG size of input: 123 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:39:55,132 WARN L293 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 112 DAG size of output: 116 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:40:13,485 WARN L293 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 132 DAG size of output: 129 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:40:22,505 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 120 DAG size of output: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:41:15,737 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 103 DAG size of output: 105 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:42:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:42:20,967 INFO L93 Difference]: Finished difference Result 2796 states and 4473 transitions. [2024-09-13 00:42:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2024-09-13 00:42:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 140 [2024-09-13 00:42:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:42:20,983 INFO L225 Difference]: With dead ends: 2796 [2024-09-13 00:42:20,984 INFO L226 Difference]: Without dead ends: 2790 [2024-09-13 00:42:20,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12765 ImplicationChecksByTransitivity, 331.2s TimeCoverageRelationStatistics Valid=5202, Invalid=32231, Unknown=9, NotChecked=0, Total=37442 [2024-09-13 00:42:20,989 INFO L434 NwaCegarLoop]: 84 mSDtfsCounter, 482 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 602 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:42:20,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 1705 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2313 Invalid, 4 Unknown, 0 Unchecked, 42.0s Time] [2024-09-13 00:42:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2024-09-13 00:42:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2128. [2024-09-13 00:42:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1076 states have (on average 1.3057620817843867) internal successors, (1405), 1076 states have internal predecessors, (1405), 1003 states have call successors, (1003), 50 states have call predecessors, (1003), 48 states have return successors, (1001), 1001 states have call predecessors, (1001), 1001 states have call successors, (1001) [2024-09-13 00:42:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3409 transitions. [2024-09-13 00:42:27,187 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3409 transitions. Word has length 140 [2024-09-13 00:42:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:42:27,187 INFO L474 AbstractCegarLoop]: Abstraction has 2128 states and 3409 transitions. [2024-09-13 00:42:27,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-13 00:42:27,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:42:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3409 transitions. [2024-09-13 00:42:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-09-13 00:42:27,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:42:27,193 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:42:27,211 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 00:42:27,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 00:42:27,394 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:42:27,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:42:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1290054545, now seen corresponding path program 8 times [2024-09-13 00:42:27,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:42:27,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778532816] [2024-09-13 00:42:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:42:27,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:42:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:42:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:42:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:42:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:42:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:42:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:42:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 00:42:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 00:42:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 00:42:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-13 00:42:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 00:42:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 00:42:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 00:42:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-13 00:42:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-13 00:42:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-13 00:42:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-13 00:42:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-13 00:42:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 00:42:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:42:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-13 00:42:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-13 00:42:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-13 00:42:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-13 00:42:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-13 00:42:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:42:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-13 00:42:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:42:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778532816] [2024-09-13 00:42:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778532816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:42:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765158148] [2024-09-13 00:42:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:42:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:42:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:42:27,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:42:27,573 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 00:42:27,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:42:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:42:27,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 00:42:27,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:42:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 458 proven. 18 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-13 00:42:27,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:42:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-13 00:42:27,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765158148] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:42:27,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:42:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-13 00:42:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386560158] [2024-09-13 00:42:27,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:42:27,827 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 00:42:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:42:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 00:42:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:42:27,828 INFO L87 Difference]: Start difference. First operand 2128 states and 3409 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-13 00:42:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:42:35,340 INFO L93 Difference]: Finished difference Result 3582 states and 5743 transitions. [2024-09-13 00:42:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:42:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 157 [2024-09-13 00:42:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:42:35,356 INFO L225 Difference]: With dead ends: 3582 [2024-09-13 00:42:35,356 INFO L226 Difference]: Without dead ends: 2426 [2024-09-13 00:42:35,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-13 00:42:35,363 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:42:35,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 248 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:42:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2024-09-13 00:42:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2272. [2024-09-13 00:42:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 1189 states have (on average 1.2867956265769553) internal successors, (1530), 1222 states have internal predecessors, (1530), 1034 states have call successors, (1034), 50 states have call predecessors, (1034), 48 states have return successors, (1032), 999 states have call predecessors, (1032), 1032 states have call successors, (1032) [2024-09-13 00:42:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3596 transitions. [2024-09-13 00:42:42,027 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3596 transitions. Word has length 157 [2024-09-13 00:42:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:42:42,027 INFO L474 AbstractCegarLoop]: Abstraction has 2272 states and 3596 transitions. [2024-09-13 00:42:42,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-13 00:42:42,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:42:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3596 transitions. [2024-09-13 00:42:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:42:42,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:42:42,034 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:42:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 00:42:42,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 00:42:42,235 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:42:42,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:42:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash -758309700, now seen corresponding path program 9 times [2024-09-13 00:42:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:42:42,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472994333] [2024-09-13 00:42:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:42:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:42:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:42:42,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221470363] [2024-09-13 00:42:42,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:42:42,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:42:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:42:42,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:42:42,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 00:42:42,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:42:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:42:42,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-13 00:42:42,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:42:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 105 proven. 48 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2024-09-13 00:42:43,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:42:45,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:42:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472994333] [2024-09-13 00:42:45,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:42:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221470363] [2024-09-13 00:42:45,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221470363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:42:45,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:42:45,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:42:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102722703] [2024-09-13 00:42:45,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:42:45,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:42:45,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:42:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:42:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:42:45,301 INFO L87 Difference]: Start difference. First operand 2272 states and 3596 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-13 00:42:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:42:54,728 INFO L93 Difference]: Finished difference Result 2636 states and 4185 transitions. [2024-09-13 00:42:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:42:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 159 [2024-09-13 00:42:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:42:54,742 INFO L225 Difference]: With dead ends: 2636 [2024-09-13 00:42:54,742 INFO L226 Difference]: Without dead ends: 2631 [2024-09-13 00:42:54,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:42:54,744 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 74 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:42:54,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 411 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 00:42:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2024-09-13 00:43:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2596. [2024-09-13 00:43:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 1341 states have (on average 1.2930648769574944) internal successors, (1734), 1383 states have internal predecessors, (1734), 1201 states have call successors, (1201), 55 states have call predecessors, (1201), 53 states have return successors, (1199), 1157 states have call predecessors, (1199), 1199 states have call successors, (1199) [2024-09-13 00:43:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 4134 transitions. [2024-09-13 00:43:02,452 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 4134 transitions. Word has length 159 [2024-09-13 00:43:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:43:02,452 INFO L474 AbstractCegarLoop]: Abstraction has 2596 states and 4134 transitions. [2024-09-13 00:43:02,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-13 00:43:02,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:43:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 4134 transitions. [2024-09-13 00:43:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-09-13 00:43:02,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:43:02,458 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:43:02,475 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 00:43:02,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 00:43:02,658 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:43:02,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:43:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash -998768174, now seen corresponding path program 10 times [2024-09-13 00:43:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:43:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645733918] [2024-09-13 00:43:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:43:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:43:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:43:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369176615] [2024-09-13 00:43:02,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:43:02,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:43:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:43:02,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:43:02,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 00:43:02,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:43:02,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:43:02,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-13 00:43:02,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:43:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 96 proven. 100 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-09-13 00:43:04,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:43:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 90 proven. 97 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2024-09-13 00:43:15,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:43:15,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645733918] [2024-09-13 00:43:15,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:43:15,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369176615] [2024-09-13 00:43:15,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369176615] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:43:15,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:43:15,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2024-09-13 00:43:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256415388] [2024-09-13 00:43:15,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:43:15,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 00:43:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:43:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 00:43:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 00:43:15,384 INFO L87 Difference]: Start difference. First operand 2596 states and 4134 transitions. Second operand has 44 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-09-13 00:43:32,547 WARN L293 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:43:38,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:43:53,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:43:55,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:44:11,507 WARN L293 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 162 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:44:34,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:44:42,101 WARN L293 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:44:46,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:44:47,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:45:25,316 WARN L293 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:45:43,391 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:45:59,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:46:27,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:46:42,556 WARN L293 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 127 DAG size of output: 138 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15