./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.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/loops-crafted-1/nested_delay_nd.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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --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 [2024-09-12 22:40:20,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:40:20,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:40:20,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:40:20,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:40:20,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:40:20,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:40:20,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:40:20,381 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:40:20,382 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:40:20,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:40:20,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:40:20,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:40:20,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:40:20,385 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:40:20,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:40:20,386 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:40:20,386 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:40:20,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:40:20,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:40:20,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:40:20,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:40:20,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:40:20,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:40:20,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:40:20,390 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:40:20,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:40:20,390 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:40:20,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:40:20,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:40:20,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:40:20,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:40:20,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:40:20,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:40:20,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:40:20,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:40:20,393 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:40:20,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:40:20,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:40:20,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:40:20,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:40:20,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:40:20,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:40:20,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:40:20,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:40:20,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:40:20,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:40:20,646 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:40:20,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-12 22:40:21,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:40:22,119 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:40:22,120 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-12 22:40:22,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5e060fcca/50b5d48dc275413ba6d60b878eeeab9b/FLAG5207cd20e [2024-09-12 22:40:22,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5e060fcca/50b5d48dc275413ba6d60b878eeeab9b [2024-09-12 22:40:22,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:40:22,516 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:40:22,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:40:22,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:40:22,525 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:40:22,525 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22, skipping insertion in model container [2024-09-12 22:40:22,526 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,548 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:40:22,683 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/loops-crafted-1/nested_delay_nd.c[465,478] [2024-09-12 22:40:22,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:40:22,716 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:40:22,738 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/loops-crafted-1/nested_delay_nd.c[465,478] [2024-09-12 22:40:22,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:40:22,776 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:40:22,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22 WrapperNode [2024-09-12 22:40:22,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:40:22,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:40:22,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:40:22,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:40:22,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,796 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:40:22,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:40:22,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:40:22,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:40:22,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:40:22,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,808 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,821 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]. [2024-09-12 22:40:22,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:40:22,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:40:22,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:40:22,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:40:22,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (1/1) ... [2024-09-12 22:40:22,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:40:22,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:22,870 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) [2024-09-12 22:40:22,876 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 [2024-09-12 22:40:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:40:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 22:40:22,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 22:40:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:40:22,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:40:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:40:22,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:40:22,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:40:22,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:40:22,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:40:22,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:40:22,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:40:22,983 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:40:22,985 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:40:23,131 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-12 22:40:23,133 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:40:23,150 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:40:23,150 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 22:40:23,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:40:23 BoogieIcfgContainer [2024-09-12 22:40:23,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:40:23,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:40:23,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:40:23,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:40:23,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:40:22" (1/3) ... [2024-09-12 22:40:23,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26084c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:40:23, skipping insertion in model container [2024-09-12 22:40:23,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:40:22" (2/3) ... [2024-09-12 22:40:23,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26084c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:40:23, skipping insertion in model container [2024-09-12 22:40:23,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:40:23" (3/3) ... [2024-09-12 22:40:23,158 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-09-12 22:40:23,172 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:40:23,172 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:40:23,211 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:40:23,217 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;@55f580cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:40:23,217 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:40:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 22:40:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:40:23,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:23,228 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:23,228 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:23,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1899367790, now seen corresponding path program 1 times [2024-09-12 22:40:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:23,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613096268] [2024-09-12 22:40:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613096268] [2024-09-12 22:40:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613096268] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:23,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:23,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:40:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839916578] [2024-09-12 22:40:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:23,436 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:40:23,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:23,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:40:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:40:23,453 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:23,546 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2024-09-12 22:40:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:40:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-12 22:40:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:23,553 INFO L225 Difference]: With dead ends: 48 [2024-09-12 22:40:23,554 INFO L226 Difference]: Without dead ends: 26 [2024-09-12 22:40:23,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:40:23,560 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:23,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-12 22:40:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-12 22:40:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:40:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-09-12 22:40:23,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2024-09-12 22:40:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:23,591 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-09-12 22:40:23,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:23,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-09-12 22:40:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:40:23,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:23,593 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:23,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:40:23,593 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:23,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -678482725, now seen corresponding path program 1 times [2024-09-12 22:40:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:23,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973973496] [2024-09-12 22:40:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:23,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973973496] [2024-09-12 22:40:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973973496] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 22:40:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353266585] [2024-09-12 22:40:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:23,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:40:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:40:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:40:23,791 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:40:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:23,902 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-09-12 22:40:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:40:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-12 22:40:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:23,903 INFO L225 Difference]: With dead ends: 44 [2024-09-12 22:40:23,903 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 22:40:23,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:40:23,905 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:23,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 13 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 22:40:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-12 22:40:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:40:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-12 22:40:23,916 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2024-09-12 22:40:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:23,917 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-12 22:40:23,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:40:23,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-12 22:40:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:40:23,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:23,919 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:23,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:40:23,919 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:23,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2109323453, now seen corresponding path program 1 times [2024-09-12 22:40:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:23,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499983892] [2024-09-12 22:40:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:40:24,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499983892] [2024-09-12 22:40:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499983892] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:24,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:24,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:40:24,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716680570] [2024-09-12 22:40:24,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:24,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:40:24,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:40:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:24,041 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:24,113 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2024-09-12 22:40:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:40:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-09-12 22:40:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:24,116 INFO L225 Difference]: With dead ends: 48 [2024-09-12 22:40:24,116 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 22:40:24,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:24,121 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:24,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 22:40:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-09-12 22:40:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:40:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-12 22:40:24,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2024-09-12 22:40:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:24,142 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-12 22:40:24,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:24,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-12 22:40:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:40:24,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:24,145 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:24,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:40:24,146 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:24,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -334316091, now seen corresponding path program 1 times [2024-09-12 22:40:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153023298] [2024-09-12 22:40:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153023298] [2024-09-12 22:40:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153023298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694149029] [2024-09-12 22:40:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:24,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:24,263 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) [2024-09-12 22:40:24,265 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:40:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:40:24,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:24,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694149029] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:24,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:24,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-09-12 22:40:24,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529349226] [2024-09-12 22:40:24,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:24,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:40:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:40:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:40:24,496 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:24,626 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-12 22:40:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:40:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-12 22:40:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:24,627 INFO L225 Difference]: With dead ends: 54 [2024-09-12 22:40:24,627 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 22:40:24,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:40:24,628 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:24,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 14 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 22:40:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-12 22:40:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:40:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-12 22:40:24,642 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 23 [2024-09-12 22:40:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:24,643 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-12 22:40:24,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-12 22:40:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:40:24,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:24,645 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] [2024-09-12 22:40:24,657 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:40:24,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:24,848 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:24,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -914591395, now seen corresponding path program 2 times [2024-09-12 22:40:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:24,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148679390] [2024-09-12 22:40:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:24,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148679390] [2024-09-12 22:40:24,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148679390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:24,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738787084] [2024-09-12 22:40:24,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:40:24,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:24,978 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) [2024-09-12 22:40:24,987 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:40:25,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:40:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:40:25,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 22:40:25,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:40:25,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:40:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738787084] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:25,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:25,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2024-09-12 22:40:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156904041] [2024-09-12 22:40:25,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:25,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:40:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:40:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:40:25,173 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 22:40:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:26,066 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2024-09-12 22:40:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-12 22:40:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-09-12 22:40:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:26,069 INFO L225 Difference]: With dead ends: 178 [2024-09-12 22:40:26,071 INFO L226 Difference]: Without dead ends: 152 [2024-09-12 22:40:26,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=677, Invalid=2079, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 22:40:26,074 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:26,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 30 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:40:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-12 22:40:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2024-09-12 22:40:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 102 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 22:40:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2024-09-12 22:40:26,117 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 32 [2024-09-12 22:40:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:26,118 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2024-09-12 22:40:26,118 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 22:40:26,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2024-09-12 22:40:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 22:40:26,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:26,120 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:26,136 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:40:26,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:26,321 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:26,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2125730691, now seen corresponding path program 1 times [2024-09-12 22:40:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:26,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831043816] [2024-09-12 22:40:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:40:26,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:26,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831043816] [2024-09-12 22:40:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831043816] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:26,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:26,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:40:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310676322] [2024-09-12 22:40:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:26,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:40:26,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:40:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:26,410 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:26,480 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2024-09-12 22:40:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:40:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-09-12 22:40:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:26,484 INFO L225 Difference]: With dead ends: 222 [2024-09-12 22:40:26,485 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 22:40:26,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:26,487 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:26,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 22:40:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2024-09-12 22:40:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 22:40:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-09-12 22:40:26,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 35 [2024-09-12 22:40:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:26,517 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-09-12 22:40:26,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:26,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-09-12 22:40:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:40:26,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:26,520 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:26,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 22:40:26,520 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:26,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1071915545, now seen corresponding path program 1 times [2024-09-12 22:40:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561930796] [2024-09-12 22:40:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:40:26,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561930796] [2024-09-12 22:40:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561930796] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:26,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:40:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109666317] [2024-09-12 22:40:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:26,584 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:40:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:40:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:26,585 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:26,657 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2024-09-12 22:40:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:40:26,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-09-12 22:40:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:26,659 INFO L225 Difference]: With dead ends: 160 [2024-09-12 22:40:26,661 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 22:40:26,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:40:26,662 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:26,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 22:40:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-12 22:40:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 79 states have internal predecessors, (100), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 22:40:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-09-12 22:40:26,689 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 36 [2024-09-12 22:40:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:26,689 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-09-12 22:40:26,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:26,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-09-12 22:40:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:40:26,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:26,694 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:26,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 22:40:26,694 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:26,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1014657243, now seen corresponding path program 1 times [2024-09-12 22:40:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:26,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806136109] [2024-09-12 22:40:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:26,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:26,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806136109] [2024-09-12 22:40:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806136109] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060289497] [2024-09-12 22:40:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:26,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:26,828 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) [2024-09-12 22:40:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:40:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:26,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:40:26,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:27,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060289497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:27,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-09-12 22:40:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570448791] [2024-09-12 22:40:27,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:27,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 22:40:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 22:40:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:40:27,148 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:27,368 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2024-09-12 22:40:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 22:40:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-09-12 22:40:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:27,370 INFO L225 Difference]: With dead ends: 239 [2024-09-12 22:40:27,370 INFO L226 Difference]: Without dead ends: 162 [2024-09-12 22:40:27,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:40:27,371 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:27,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 14 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-12 22:40:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2024-09-12 22:40:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 140 states have (on average 1.25) internal successors, (175), 141 states have internal predecessors, (175), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 22:40:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2024-09-12 22:40:27,400 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 36 [2024-09-12 22:40:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:27,400 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2024-09-12 22:40:27,400 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:27,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2024-09-12 22:40:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 22:40:27,402 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:27,402 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:27,418 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:40:27,602 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 22:40:27,603 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:27,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1524013939, now seen corresponding path program 2 times [2024-09-12 22:40:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302853250] [2024-09-12 22:40:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:27,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:27,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:27,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:27,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302853250] [2024-09-12 22:40:27,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302853250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:27,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491964475] [2024-09-12 22:40:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:40:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:27,879 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) [2024-09-12 22:40:27,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:40:27,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:40:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:40:27,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 22:40:27,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:28,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:28,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491964475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:28,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:28,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2024-09-12 22:40:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640808915] [2024-09-12 22:40:28,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:28,563 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 22:40:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 22:40:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1103, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 22:40:28,565 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:29,080 INFO L93 Difference]: Finished difference Result 443 states and 595 transitions. [2024-09-12 22:40:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 22:40:29,081 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2024-09-12 22:40:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:29,082 INFO L225 Difference]: With dead ends: 443 [2024-09-12 22:40:29,083 INFO L226 Difference]: Without dead ends: 304 [2024-09-12 22:40:29,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 22:40:29,085 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:29,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 15 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:40:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-09-12 22:40:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 276. [2024-09-12 22:40:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 266 states have (on average 1.236842105263158) internal successors, (329), 267 states have internal predecessors, (329), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 22:40:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2024-09-12 22:40:29,131 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 57 [2024-09-12 22:40:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:29,132 INFO L474 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2024-09-12 22:40:29,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:29,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2024-09-12 22:40:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 22:40:29,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:29,138 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:29,154 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 22:40:29,341 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:29,341 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:29,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash -610331763, now seen corresponding path program 3 times [2024-09-12 22:40:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388907540] [2024-09-12 22:40:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:29,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:30,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:30,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:30,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388907540] [2024-09-12 22:40:30,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388907540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:30,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026749198] [2024-09-12 22:40:30,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:40:30,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:30,015 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) [2024-09-12 22:40:30,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:40:30,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:40:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:40:30,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:40:30,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-09-12 22:40:30,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 22:40:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026749198] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 22:40:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [31] total 38 [2024-09-12 22:40:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836852001] [2024-09-12 22:40:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:30,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:40:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:40:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=976, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 22:40:30,486 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:30,628 INFO L93 Difference]: Finished difference Result 460 states and 556 transitions. [2024-09-12 22:40:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:40:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2024-09-12 22:40:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:30,631 INFO L225 Difference]: With dead ends: 460 [2024-09-12 22:40:30,631 INFO L226 Difference]: Without dead ends: 458 [2024-09-12 22:40:30,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1048, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:40:30,633 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:30,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-09-12 22:40:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2024-09-12 22:40:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 442 states have (on average 1.2171945701357465) internal successors, (538), 444 states have internal predecessors, (538), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 22:40:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 551 transitions. [2024-09-12 22:40:30,715 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 551 transitions. Word has length 99 [2024-09-12 22:40:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:30,716 INFO L474 AbstractCegarLoop]: Abstraction has 456 states and 551 transitions. [2024-09-12 22:40:30,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:40:30,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 551 transitions. [2024-09-12 22:40:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 22:40:30,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:30,719 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:30,734 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:40:30,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:40:30,920 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:30,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash -612178805, now seen corresponding path program 1 times [2024-09-12 22:40:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:30,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417987655] [2024-09-12 22:40:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:31,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:31,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2024-09-12 22:40:31,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417987655] [2024-09-12 22:40:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417987655] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:40:31,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:40:31,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 22:40:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116534475] [2024-09-12 22:40:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:40:31,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:40:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:40:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:40:31,073 INFO L87 Difference]: Start difference. First operand 456 states and 551 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:40:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:31,266 INFO L93 Difference]: Finished difference Result 978 states and 1200 transitions. [2024-09-12 22:40:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:40:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2024-09-12 22:40:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:31,272 INFO L225 Difference]: With dead ends: 978 [2024-09-12 22:40:31,272 INFO L226 Difference]: Without dead ends: 713 [2024-09-12 22:40:31,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:40:31,273 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:31,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:40:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-09-12 22:40:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-09-12 22:40:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 696 states have (on average 1.221264367816092) internal successors, (850), 699 states have internal predecessors, (850), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 22:40:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 869 transitions. [2024-09-12 22:40:31,405 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 869 transitions. Word has length 99 [2024-09-12 22:40:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:31,405 INFO L474 AbstractCegarLoop]: Abstraction has 713 states and 869 transitions. [2024-09-12 22:40:31,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:40:31,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 869 transitions. [2024-09-12 22:40:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 22:40:31,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:31,411 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:31,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-12 22:40:31,411 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:31,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash 119150093, now seen corresponding path program 1 times [2024-09-12 22:40:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955698963] [2024-09-12 22:40:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:32,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:32,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955698963] [2024-09-12 22:40:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955698963] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641918647] [2024-09-12 22:40:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:32,031 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) [2024-09-12 22:40:32,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:40:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:32,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 22:40:32,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:32,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:33,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641918647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:33,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:33,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 87 [2024-09-12 22:40:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414729737] [2024-09-12 22:40:33,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:33,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-12 22:40:33,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-12 22:40:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3063, Invalid=4419, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 22:40:33,880 INFO L87 Difference]: Start difference. First operand 713 states and 869 transitions. Second operand has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:40:37,236 INFO L93 Difference]: Finished difference Result 2542 states and 3418 transitions. [2024-09-12 22:40:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-09-12 22:40:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 99 [2024-09-12 22:40:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:40:37,247 INFO L225 Difference]: With dead ends: 2542 [2024-09-12 22:40:37,247 INFO L226 Difference]: Without dead ends: 1999 [2024-09-12 22:40:37,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10338 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9966, Invalid=21186, Unknown=0, NotChecked=0, Total=31152 [2024-09-12 22:40:37,254 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 988 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:40:37,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 29 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:40:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2024-09-12 22:40:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1819. [2024-09-12 22:40:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1797 states have (on average 1.196438508625487) internal successors, (2150), 1801 states have internal predecessors, (2150), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 22:40:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2175 transitions. [2024-09-12 22:40:37,575 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2175 transitions. Word has length 99 [2024-09-12 22:40:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:40:37,575 INFO L474 AbstractCegarLoop]: Abstraction has 1819 states and 2175 transitions. [2024-09-12 22:40:37,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:40:37,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2175 transitions. [2024-09-12 22:40:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-09-12 22:40:37,579 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:40:37,579 INFO L216 NwaCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:40:37,595 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:40:37,783 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 22:40:37,784 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:40:37,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:40:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash 756563597, now seen corresponding path program 2 times [2024-09-12 22:40:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:40:37,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830032377] [2024-09-12 22:40:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:40:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:40:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:39,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:40:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:39,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:40:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:40:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:39,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:40:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830032377] [2024-09-12 22:40:39,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830032377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:40:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120604850] [2024-09-12 22:40:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:40:39,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:40:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:40:39,798 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) [2024-09-12 22:40:39,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:40:39,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:40:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:40:39,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-12 22:40:39,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:40:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:41,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:40:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:40:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120604850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:40:45,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:40:45,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 173 [2024-09-12 22:40:45,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886513091] [2024-09-12 22:40:45,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:40:45,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-09-12 22:40:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:40:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-09-12 22:40:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12125, Invalid=17631, Unknown=0, NotChecked=0, Total=29756 [2024-09-12 22:40:45,074 INFO L87 Difference]: Start difference. First operand 1819 states and 2175 transitions. Second operand has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:41:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:41:03,960 INFO L93 Difference]: Finished difference Result 12026 states and 14700 transitions. [2024-09-12 22:41:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-09-12 22:41:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 183 [2024-09-12 22:41:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:41:03,998 INFO L225 Difference]: With dead ends: 12026 [2024-09-12 22:41:03,999 INFO L226 Difference]: Without dead ends: 10628 [2024-09-12 22:41:04,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67792 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=60774, Invalid=140378, Unknown=0, NotChecked=0, Total=201152 [2024-09-12 22:41:04,016 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2314 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:41:04,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 34 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:41:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10628 states. [2024-09-12 22:41:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10628 to 4196. [2024-09-12 22:41:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4169 states have (on average 1.2165987047253537) internal successors, (5072), 4174 states have internal predecessors, (5072), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 22:41:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 5103 transitions. [2024-09-12 22:41:05,028 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 5103 transitions. Word has length 183 [2024-09-12 22:41:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:41:05,031 INFO L474 AbstractCegarLoop]: Abstraction has 4196 states and 5103 transitions. [2024-09-12 22:41:05,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 22:41:05,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 5103 transitions. [2024-09-12 22:41:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2024-09-12 22:41:05,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:41:05,037 INFO L216 NwaCegarLoop]: trace histogram [108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:41:05,054 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:41:05,237 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:41:05,238 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:41:05,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:05,238 INFO L85 PathProgramCache]: Analyzing trace with hash 613596365, now seen corresponding path program 1 times [2024-09-12 22:41:05,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:41:05,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744365160] [2024-09-12 22:41:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:41:05,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:41:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:05,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:41:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:05,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:41:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-12 22:41:05,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:41:05,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744365160] [2024-09-12 22:41:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744365160] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:41:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:41:05,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 22:41:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176062799] [2024-09-12 22:41:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:41:05,449 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:41:05,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:41:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:41:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:41:05,449 INFO L87 Difference]: Start difference. First operand 4196 states and 5103 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:41:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:41:06,610 INFO L93 Difference]: Finished difference Result 7524 states and 9224 transitions. [2024-09-12 22:41:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:41:06,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 345 [2024-09-12 22:41:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:41:06,633 INFO L225 Difference]: With dead ends: 7524 [2024-09-12 22:41:06,634 INFO L226 Difference]: Without dead ends: 5851 [2024-09-12 22:41:06,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:41:06,638 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:41:06,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:41:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2024-09-12 22:41:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4871. [2024-09-12 22:41:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4842 states have (on average 1.2327550598926063) internal successors, (5969), 4847 states have internal predecessors, (5969), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 22:41:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 6004 transitions. [2024-09-12 22:41:08,036 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 6004 transitions. Word has length 345 [2024-09-12 22:41:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:41:08,037 INFO L474 AbstractCegarLoop]: Abstraction has 4871 states and 6004 transitions. [2024-09-12 22:41:08,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:41:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 6004 transitions. [2024-09-12 22:41:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-09-12 22:41:08,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:41:08,042 INFO L216 NwaCegarLoop]: trace histogram [109, 109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:41:08,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-12 22:41:08,042 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:41:08,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1256704231, now seen corresponding path program 3 times [2024-09-12 22:41:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:41:08,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417585663] [2024-09-12 22:41:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:41:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:41:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:14,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:41:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:14,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:41:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 0 proven. 17767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:41:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:41:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417585663] [2024-09-12 22:41:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417585663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:41:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699157642] [2024-09-12 22:41:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:41:14,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:41:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:41:14,691 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) [2024-09-12 22:41:14,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:41:14,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:41:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:41:14,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:41:14,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:41:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-12 22:41:15,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 22:41:15,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699157642] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:41:15,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 22:41:15,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [115] total 122 [2024-09-12 22:41:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223840592] [2024-09-12 22:41:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:41:15,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:41:15,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:41:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:41:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6133, Invalid=8629, Unknown=0, NotChecked=0, Total=14762 [2024-09-12 22:41:15,932 INFO L87 Difference]: Start difference. First operand 4871 states and 6004 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:41:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:41:17,211 INFO L93 Difference]: Finished difference Result 4882 states and 6015 transitions. [2024-09-12 22:41:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:41:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 348 [2024-09-12 22:41:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:41:17,230 INFO L225 Difference]: With dead ends: 4882 [2024-09-12 22:41:17,230 INFO L226 Difference]: Without dead ends: 4880 [2024-09-12 22:41:17,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6137, Invalid=8869, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 22:41:17,232 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:41:17,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:41:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2024-09-12 22:41:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4879. [2024-09-12 22:41:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4848 states have (on average 1.23246699669967) internal successors, (5975), 4854 states have internal predecessors, (5975), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 22:41:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6012 transitions. [2024-09-12 22:41:17,990 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6012 transitions. Word has length 348 [2024-09-12 22:41:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:41:17,991 INFO L474 AbstractCegarLoop]: Abstraction has 4879 states and 6012 transitions. [2024-09-12 22:41:17,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 22:41:17,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6012 transitions. [2024-09-12 22:41:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2024-09-12 22:41:18,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:41:18,009 INFO L216 NwaCegarLoop]: trace histogram [216, 216, 216, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:41:18,026 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 22:41:18,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:41:18,211 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:41:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:41:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 346650736, now seen corresponding path program 1 times [2024-09-12 22:41:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:41:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460483114] [2024-09-12 22:41:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:41:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:41:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:26,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:41:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:26,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:41:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:26,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2024-09-12 22:41:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-12 22:41:26,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:41:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460483114] [2024-09-12 22:41:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460483114] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:41:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558672704] [2024-09-12 22:41:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:41:26,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:41:26,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:41:26,332 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) [2024-09-12 22:41:26,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:41:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:41:26,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-12 22:41:26,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:41:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35210 proven. 17442 refuted. 0 times theorem prover too weak. 17449 trivial. 0 not checked. [2024-09-12 22:41:31,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:41:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-12 22:41:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558672704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:41:44,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:41:44,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 332 [2024-09-12 22:41:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853970989] [2024-09-12 22:41:44,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:41:44,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 332 states [2024-09-12 22:41:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:41:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 332 interpolants. [2024-09-12 22:41:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48405, Invalid=61487, Unknown=0, NotChecked=0, Total=109892 [2024-09-12 22:41:44,132 INFO L87 Difference]: Start difference. First operand 4879 states and 6012 transitions. Second operand has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 22:42:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:42:20,497 INFO L93 Difference]: Finished difference Result 61262 states and 67026 transitions. [2024-09-12 22:42:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2024-09-12 22:42:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 680 [2024-09-12 22:42:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:42:20,649 INFO L225 Difference]: With dead ends: 61262 [2024-09-12 22:42:20,650 INFO L226 Difference]: Without dead ends: 57210 [2024-09-12 22:42:20,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1587 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71936 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=72717, Invalid=122205, Unknown=0, NotChecked=0, Total=194922 [2024-09-12 22:42:20,684 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1843 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:42:20,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 22 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 22:42:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57210 states. [2024-09-12 22:42:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57210 to 11786. [2024-09-12 22:42:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11786 states, 11755 states have (on average 1.1982135261590812) internal successors, (14085), 11761 states have internal predecessors, (14085), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 22:42:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11786 states to 11786 states and 14122 transitions. [2024-09-12 22:42:27,536 INFO L78 Accepts]: Start accepts. Automaton has 11786 states and 14122 transitions. Word has length 680 [2024-09-12 22:42:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:42:27,537 INFO L474 AbstractCegarLoop]: Abstraction has 11786 states and 14122 transitions. [2024-09-12 22:42:27,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 22:42:27,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:42:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11786 states and 14122 transitions. [2024-09-12 22:42:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2024-09-12 22:42:27,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:42:27,590 INFO L216 NwaCegarLoop]: trace histogram [436, 436, 436, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:42:27,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 22:42:27,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:42:27,791 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:42:27,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:42:27,791 INFO L85 PathProgramCache]: Analyzing trace with hash 379592880, now seen corresponding path program 2 times [2024-09-12 22:42:27,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:42:27,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629872304] [2024-09-12 22:42:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:42:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:42:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:43:03,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:43:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:43:03,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:43:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:43:03,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 671 [2024-09-12 22:43:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:43:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-12 22:43:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:43:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629872304] [2024-09-12 22:43:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629872304] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:43:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621859940] [2024-09-12 22:43:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:43:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:43:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:43:03,579 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) [2024-09-12 22:43:03,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:43:03,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:43:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:43:03,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 221 conjuncts are in the unsatisfiable core [2024-09-12 22:43:03,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:43:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143010 proven. 71177 refuted. 0 times theorem prover too weak. 71184 trivial. 0 not checked. [2024-09-12 22:43:22,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:44:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-12 22:44:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621859940] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:44:12,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:44:12,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [223, 222, 222] total 662 [2024-09-12 22:44:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388642643] [2024-09-12 22:44:12,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:44:12,621 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 662 states [2024-09-12 22:44:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:44:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 662 interpolants. [2024-09-12 22:44:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193605, Invalid=243977, Unknown=0, NotChecked=0, Total=437582 [2024-09-12 22:44:12,663 INFO L87 Difference]: Start difference. First operand 11786 states and 14122 transitions. Second operand has 662 states, 662 states have (on average 3.0181268882175227) internal successors, (1998), 661 states have internal predecessors, (1998), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 22:49:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:49:43,125 INFO L93 Difference]: Finished difference Result 117024 states and 128621 transitions. [2024-09-12 22:49:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2024-09-12 22:49:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 662 states, 662 states have (on average 3.0181268882175227) internal successors, (1998), 661 states have internal predecessors, (1998), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 1340 [2024-09-12 22:49:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:49:43,573 INFO L225 Difference]: With dead ends: 117024 [2024-09-12 22:49:43,573 INFO L226 Difference]: Without dead ends: 107380 [2024-09-12 22:49:43,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3127 GetRequests, 2247 SyntacticMatches, 0 SemanticMatches, 880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289076 ImplicationChecksByTransitivity, 126.7s TimeCoverageRelationStatistics Valid=290627, Invalid=486415, Unknown=0, NotChecked=0, Total=777042 [2024-09-12 22:49:43,666 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 3467 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:49:43,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3468 Valid, 32 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 22:49:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107380 states. [2024-09-12 22:50:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107380 to 25646. [2024-09-12 22:50:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25646 states, 25615 states have (on average 1.18543821979309) internal successors, (30365), 25621 states have internal predecessors, (30365), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 22:50:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 30402 transitions. [2024-09-12 22:50:20,174 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 30402 transitions. Word has length 1340 [2024-09-12 22:50:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:50:20,175 INFO L474 AbstractCegarLoop]: Abstraction has 25646 states and 30402 transitions. [2024-09-12 22:50:20,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 662 states, 662 states have (on average 3.0181268882175227) internal successors, (1998), 661 states have internal predecessors, (1998), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 22:50:20,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:50:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 30402 transitions. [2024-09-12 22:50:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2661 [2024-09-12 22:50:20,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:50:20,239 INFO L216 NwaCegarLoop]: trace histogram [876, 876, 876, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:50:20,259 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:50:20,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:50:20,439 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:50:20,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:50:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1070333648, now seen corresponding path program 3 times [2024-09-12 22:50:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:50:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956428110] [2024-09-12 22:50:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:50:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:50:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:30,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:53:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:30,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 22:53:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:30,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1331 [2024-09-12 22:53:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:53:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1151511 backedges. 576412 proven. 287547 refuted. 0 times theorem prover too weak. 287552 trivial. 0 not checked. [2024-09-12 22:53:30,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:53:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956428110] [2024-09-12 22:53:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956428110] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:53:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823186395] [2024-09-12 22:53:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:53:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:53:30,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:53:30,661 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) [2024-09-12 22:53:30,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:53:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:53:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:53:30,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 22:53:30,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:53:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1151511 backedges. 577291 proven. 0 refuted. 0 times theorem prover too weak. 574220 trivial. 0 not checked. [2024-09-12 22:53:32,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 22:53:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823186395] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:53:32,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 22:53:32,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [443] total 447 [2024-09-12 22:53:32,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777228344] [2024-09-12 22:53:32,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:53:32,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:53:32,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:53:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:53:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97034, Invalid=102328, Unknown=0, NotChecked=0, Total=199362 [2024-09-12 22:53:32,683 INFO L87 Difference]: Start difference. First operand 25646 states and 30402 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Killed by 15