./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.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 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.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 bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --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-1d5fa63-m [2024-09-13 09:15:56,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:15:56,402 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:15:56,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:15:56,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:15:56,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:15:56,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:15:56,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:15:56,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:15:56,434 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:15:56,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:15:56,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:15:56,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:15:56,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:15:56,436 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:15:56,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:15:56,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:15:56,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:15:56,437 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:15:56,437 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:15:56,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:15:56,438 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:15:56,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:15:56,438 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:15:56,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:15:56,439 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:15:56,439 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:15:56,439 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:15:56,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:15:56,440 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:15:56,440 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:15:56,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:15:56,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:15:56,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:15:56,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:15:56,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:15:56,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:15:56,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:15:56,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:15:56,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:15:56,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:15:56,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:15:56,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:15:56,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:15:56,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:15:56,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:15:56,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:15:56,661 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:15:56,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-09-13 09:15:57,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:15:58,075 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:15:58,075 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-09-13 09:15:58,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/daf49e26a/0fe36426abf1401d9600ae219bcce95b/FLAGa56640053 [2024-09-13 09:15:58,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/daf49e26a/0fe36426abf1401d9600ae219bcce95b [2024-09-13 09:15:58,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:15:58,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:15:58,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:15:58,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:15:58,117 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:15:58,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c061e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58, skipping insertion in model container [2024-09-13 09:15:58,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:15:58,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-09-13 09:15:58,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:15:58,300 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:15:58,309 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-09-13 09:15:58,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:15:58,346 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:15:58,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58 WrapperNode [2024-09-13 09:15:58,346 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:15:58,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:15:58,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:15:58,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:15:58,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,366 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:15:58,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:15:58,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:15:58,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:15:58,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:15:58,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,380 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,394 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 09:15:58,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:15:58,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:15:58,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:15:58,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:15:58,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (1/1) ... [2024-09-13 09:15:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:15:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:58,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 09:15:58,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 09:15:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:15:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:15:58,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:15:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:15:58,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:15:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:15:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:15:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:15:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:15:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:15:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:15:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:15:58,529 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:15:58,530 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:15:58,658 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 09:15:58,658 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:15:58,673 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:15:58,673 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 09:15:58,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:15:58 BoogieIcfgContainer [2024-09-13 09:15:58,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:15:58,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:15:58,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:15:58,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:15:58,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:15:58" (1/3) ... [2024-09-13 09:15:58,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1c5c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:15:58, skipping insertion in model container [2024-09-13 09:15:58,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:15:58" (2/3) ... [2024-09-13 09:15:58,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1c5c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:15:58, skipping insertion in model container [2024-09-13 09:15:58,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:15:58" (3/3) ... [2024-09-13 09:15:58,679 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2024-09-13 09:15:58,692 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:15:58,692 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:15:58,765 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:15:58,772 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;@3b9010dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:15:58,773 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:15:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 09:15:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 09:15:58,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:58,789 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:58,790 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:58,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-13 09:15:58,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:58,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436581464] [2024-09-13 09:15:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:58,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:15:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:15:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:15:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:15:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:15:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:15:59,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:59,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436581464] [2024-09-13 09:15:59,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436581464] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:59,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:59,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 09:15:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403374016] [2024-09-13 09:15:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:59,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 09:15:59,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 09:15:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:15:59,051 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:15:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:59,091 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-13 09:15:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 09:15:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-13 09:15:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:59,100 INFO L225 Difference]: With dead ends: 70 [2024-09-13 09:15:59,101 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 09:15:59,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:15:59,106 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:59,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:15:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 09:15:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 09:15:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 09:15:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-13 09:15:59,149 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-13 09:15:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:59,149 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-13 09:15:59,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:15:59,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-13 09:15:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 09:15:59,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:59,167 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:59,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:15:59,167 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:59,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-13 09:15:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:59,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103139048] [2024-09-13 09:15:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:15:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:15:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:15:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:15:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:15:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:15:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103139048] [2024-09-13 09:15:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103139048] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:59,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 09:15:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281972843] [2024-09-13 09:15:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:59,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 09:15:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 09:15:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:59,493 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:15:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:59,570 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-13 09:15:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:15:59,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-13 09:15:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:59,572 INFO L225 Difference]: With dead ends: 53 [2024-09-13 09:15:59,572 INFO L226 Difference]: Without dead ends: 46 [2024-09-13 09:15:59,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:59,573 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:59,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:15:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-13 09:15:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-13 09:15:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 09:15:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-13 09:15:59,584 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-13 09:15:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:59,585 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-13 09:15:59,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:15:59,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-13 09:15:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:15:59,586 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:59,586 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:59,587 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:15:59,587 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:15:59,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-13 09:15:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:15:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809109325] [2024-09-13 09:15:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:15:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:15:59,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785077990] [2024-09-13 09:15:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:15:59,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:15:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:15:59,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:15:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:15:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:15:59,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:15:59,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:15:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:15:59,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:15:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:15:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809109325] [2024-09-13 09:15:59,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:15:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785077990] [2024-09-13 09:15:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785077990] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:15:59,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:15:59,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:15:59,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775922748] [2024-09-13 09:15:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:15:59,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:15:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:15:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:15:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:15:59,758 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:15:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:15:59,812 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-13 09:15:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:15:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-13 09:15:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:15:59,816 INFO L225 Difference]: With dead ends: 52 [2024-09-13 09:15:59,816 INFO L226 Difference]: Without dead ends: 50 [2024-09-13 09:15:59,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:15:59,818 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:15:59,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:15:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-13 09:15:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-13 09:15:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-13 09:15:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-13 09:15:59,846 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-13 09:15:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:15:59,846 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-13 09:15:59,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:15:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:15:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-13 09:15:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 09:15:59,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:15:59,848 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:15:59,862 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:00,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:00,053 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:00,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-13 09:16:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023245744] [2024-09-13 09:16:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:00,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023245744] [2024-09-13 09:16:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023245744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894527537] [2024-09-13 09:16:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:00,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:00,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:00,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:16:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:16:00,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:00,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:00,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894527537] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:00,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:00,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 09:16:00,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75759106] [2024-09-13 09:16:00,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:00,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:16:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:16:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:16:00,362 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:00,528 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-13 09:16:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:16:00,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-13 09:16:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:00,530 INFO L225 Difference]: With dead ends: 102 [2024-09-13 09:16:00,530 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 09:16:00,531 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:16:00,532 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:00,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 09:16:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-13 09:16:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 09:16:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-13 09:16:00,572 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-13 09:16:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:00,572 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-13 09:16:00,572 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:00,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-13 09:16:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 09:16:00,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:00,575 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:00,588 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:00,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:00,776 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:00,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-13 09:16:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:00,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844194242] [2024-09-13 09:16:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:00,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478784032] [2024-09-13 09:16:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:00,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:00,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:16:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:00,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:16:00,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:00,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:00,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844194242] [2024-09-13 09:16:00,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478784032] [2024-09-13 09:16:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478784032] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:00,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646581043] [2024-09-13 09:16:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:00,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:00,913 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:00,966 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-13 09:16:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-13 09:16:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:00,968 INFO L225 Difference]: With dead ends: 78 [2024-09-13 09:16:00,968 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 09:16:00,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:00,969 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:00,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 09:16:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-13 09:16:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 09:16:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-13 09:16:00,989 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-13 09:16:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:00,991 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-13 09:16:00,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:00,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-13 09:16:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 09:16:00,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:00,994 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:01,018 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:01,194 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:01,195 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:01,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-13 09:16:01,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812817004] [2024-09-13 09:16:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:01,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290192635] [2024-09-13 09:16:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:01,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:01,224 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:16:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:01,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:16:01,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:01,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812817004] [2024-09-13 09:16:01,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290192635] [2024-09-13 09:16:01,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290192635] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:01,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:01,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-13 09:16:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720244069] [2024-09-13 09:16:01,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:01,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 09:16:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 09:16:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:16:01,740 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:02,901 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-13 09:16:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 09:16:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-13 09:16:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:02,902 INFO L225 Difference]: With dead ends: 132 [2024-09-13 09:16:02,902 INFO L226 Difference]: Without dead ends: 130 [2024-09-13 09:16:02,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:16:02,904 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:02,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 09:16:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-13 09:16:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-13 09:16:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-13 09:16:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-13 09:16:02,926 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-13 09:16:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:02,926 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-13 09:16:02,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:02,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-13 09:16:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:16:02,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:02,931 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:02,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:16:03,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:03,131 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-13 09:16:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:03,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531761073] [2024-09-13 09:16:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:03,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344786101] [2024-09-13 09:16:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:03,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:03,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:16:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:03,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:16:03,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:16:03,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531761073] [2024-09-13 09:16:03,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344786101] [2024-09-13 09:16:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344786101] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566537440] [2024-09-13 09:16:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:03,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:03,240 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:03,379 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-13 09:16:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-13 09:16:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:03,381 INFO L225 Difference]: With dead ends: 155 [2024-09-13 09:16:03,381 INFO L226 Difference]: Without dead ends: 153 [2024-09-13 09:16:03,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:03,382 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:03,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-13 09:16:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-13 09:16:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-13 09:16:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-13 09:16:03,417 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-13 09:16:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:03,417 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-13 09:16:03,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:03,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-13 09:16:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:16:03,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:03,418 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:03,431 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:03,618 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 09:16:03,619 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:03,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:03,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-13 09:16:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588938978] [2024-09-13 09:16:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342691205] [2024-09-13 09:16:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:03,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:03,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:16:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:03,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 09:16:03,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:03,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:03,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588938978] [2024-09-13 09:16:03,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342691205] [2024-09-13 09:16:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342691205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:03,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-13 09:16:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427647128] [2024-09-13 09:16:03,863 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:03,864 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:16:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:16:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:16:03,864 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:04,054 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-13 09:16:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:16:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-13 09:16:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:04,056 INFO L225 Difference]: With dead ends: 174 [2024-09-13 09:16:04,056 INFO L226 Difference]: Without dead ends: 172 [2024-09-13 09:16:04,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:16:04,057 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:04,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-13 09:16:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-13 09:16:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:16:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-13 09:16:04,090 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-13 09:16:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:04,090 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-13 09:16:04,090 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:04,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-13 09:16:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 09:16:04,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:04,091 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:04,110 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:16:04,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:04,292 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:04,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-13 09:16:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000422922] [2024-09-13 09:16:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760498880] [2024-09-13 09:16:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:04,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:04,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:16:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:16:04,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 09:16:04,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:04,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:04,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000422922] [2024-09-13 09:16:04,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:04,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760498880] [2024-09-13 09:16:04,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760498880] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:04,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163409461] [2024-09-13 09:16:04,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:04,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:04,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:04,391 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:16:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:04,512 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-13 09:16:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-13 09:16:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:04,515 INFO L225 Difference]: With dead ends: 254 [2024-09-13 09:16:04,517 INFO L226 Difference]: Without dead ends: 252 [2024-09-13 09:16:04,517 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:04,518 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:04,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-13 09:16:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-13 09:16:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-13 09:16:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-13 09:16:04,606 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-13 09:16:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:04,606 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-13 09:16:04,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:16:04,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-13 09:16:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 09:16:04,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:04,609 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:04,635 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:04,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:04,810 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:04,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-13 09:16:04,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:04,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447767372] [2024-09-13 09:16:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:04,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447767372] [2024-09-13 09:16:04,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447767372] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:04,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:04,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:04,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89450585] [2024-09-13 09:16:04,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:04,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:04,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:04,897 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:04,992 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-13 09:16:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:16:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-13 09:16:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:04,995 INFO L225 Difference]: With dead ends: 291 [2024-09-13 09:16:04,995 INFO L226 Difference]: Without dead ends: 177 [2024-09-13 09:16:04,996 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:04,996 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:04,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-13 09:16:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-13 09:16:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-13 09:16:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-13 09:16:05,028 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-13 09:16:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:05,028 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-13 09:16:05,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 09:16:05,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-13 09:16:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 09:16:05,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:05,029 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:05,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-13 09:16:05,030 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:05,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:05,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-13 09:16:05,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:05,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579686885] [2024-09-13 09:16:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:05,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287108169] [2024-09-13 09:16:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:05,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:05,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:05,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:16:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:05,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 09:16:05,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 09:16:05,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 09:16:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579686885] [2024-09-13 09:16:06,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287108169] [2024-09-13 09:16:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287108169] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:06,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-09-13 09:16:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079493992] [2024-09-13 09:16:06,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:06,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 09:16:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 09:16:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-13 09:16:06,767 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:16:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:10,111 INFO L93 Difference]: Finished difference Result 324 states and 489 transitions. [2024-09-13 09:16:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 09:16:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 63 [2024-09-13 09:16:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:10,115 INFO L225 Difference]: With dead ends: 324 [2024-09-13 09:16:10,117 INFO L226 Difference]: Without dead ends: 316 [2024-09-13 09:16:10,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 09:16:10,119 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 241 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:10,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 489 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 09:16:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-13 09:16:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 239. [2024-09-13 09:16:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 128 states have (on average 1.203125) internal successors, (154), 138 states have internal predecessors, (154), 99 states have call successors, (99), 12 states have call predecessors, (99), 11 states have return successors, (97), 88 states have call predecessors, (97), 97 states have call successors, (97) [2024-09-13 09:16:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 350 transitions. [2024-09-13 09:16:10,226 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 350 transitions. Word has length 63 [2024-09-13 09:16:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:10,226 INFO L474 AbstractCegarLoop]: Abstraction has 239 states and 350 transitions. [2024-09-13 09:16:10,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:16:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 350 transitions. [2024-09-13 09:16:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 09:16:10,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:10,228 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:10,246 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 09:16:10,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:10,433 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:10,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash 819880594, now seen corresponding path program 2 times [2024-09-13 09:16:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:10,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327510606] [2024-09-13 09:16:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 09:16:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:10,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327510606] [2024-09-13 09:16:10,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327510606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315796922] [2024-09-13 09:16:10,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:10,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:10,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:10,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:10,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:16:10,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:10,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 09:16:10,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 09:16:10,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 09:16:10,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315796922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:10,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:10,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-13 09:16:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006432852] [2024-09-13 09:16:10,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:10,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:16:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:16:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:16:10,759 INFO L87 Difference]: Start difference. First operand 239 states and 350 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:11,186 INFO L93 Difference]: Finished difference Result 363 states and 544 transitions. [2024-09-13 09:16:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:16:11,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-09-13 09:16:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:11,189 INFO L225 Difference]: With dead ends: 363 [2024-09-13 09:16:11,189 INFO L226 Difference]: Without dead ends: 356 [2024-09-13 09:16:11,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-09-13 09:16:11,190 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 56 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:11,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 378 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:16:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-13 09:16:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 237. [2024-09-13 09:16:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 137 states have internal predecessors, (160), 95 states have call successors, (95), 12 states have call predecessors, (95), 11 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-13 09:16:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 348 transitions. [2024-09-13 09:16:11,259 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 348 transitions. Word has length 68 [2024-09-13 09:16:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:11,259 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 348 transitions. [2024-09-13 09:16:11,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:11,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 348 transitions. [2024-09-13 09:16:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:11,260 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:11,260 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:11,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 09:16:11,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-13 09:16:11,465 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:11,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-13 09:16:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:11,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26625533] [2024-09-13 09:16:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-13 09:16:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 09:16:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:16:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26625533] [2024-09-13 09:16:11,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26625533] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:11,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:11,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437413776] [2024-09-13 09:16:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:11,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:11,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:11,545 INFO L87 Difference]: Start difference. First operand 237 states and 348 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:16:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:11,665 INFO L93 Difference]: Finished difference Result 408 states and 596 transitions. [2024-09-13 09:16:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-13 09:16:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:11,667 INFO L225 Difference]: With dead ends: 408 [2024-09-13 09:16:11,667 INFO L226 Difference]: Without dead ends: 246 [2024-09-13 09:16:11,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:11,668 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:11,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-09-13 09:16:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 228. [2024-09-13 09:16:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-13 09:16:11,731 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-13 09:16:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:11,732 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-13 09:16:11,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:16:11,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-13 09:16:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 09:16:11,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:11,733 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:11,733 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-13 09:16:11,733 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:11,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-13 09:16:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976695372] [2024-09-13 09:16:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560815274] [2024-09-13 09:16:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:11,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:11,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:16:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 09:16:11,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-13 09:16:11,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 09:16:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976695372] [2024-09-13 09:16:11,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560815274] [2024-09-13 09:16:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560815274] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:11,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:11,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-13 09:16:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210677729] [2024-09-13 09:16:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:11,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:11,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:11,960 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:12,111 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-13 09:16:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-13 09:16:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:12,114 INFO L225 Difference]: With dead ends: 234 [2024-09-13 09:16:12,114 INFO L226 Difference]: Without dead ends: 232 [2024-09-13 09:16:12,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:16:12,115 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:12,116 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-13 09:16:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-13 09:16:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-13 09:16:12,225 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-13 09:16:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:12,225 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-13 09:16:12,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-13 09:16:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:12,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:12,227 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:12,244 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 09:16:12,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 09:16:12,432 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:12,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-13 09:16:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:12,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051686195] [2024-09-13 09:16:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 09:16:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 09:16:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:12,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051686195] [2024-09-13 09:16:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051686195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:12,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218676432] [2024-09-13 09:16:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:12,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:12,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:12,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:16:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 09:16:12,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-13 09:16:12,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 09:16:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218676432] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:12,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:12,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-13 09:16:12,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500955542] [2024-09-13 09:16:12,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:12,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 09:16:12,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 09:16:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:16:12,989 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 09:16:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:13,309 INFO L93 Difference]: Finished difference Result 322 states and 450 transitions. [2024-09-13 09:16:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:16:13,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2024-09-13 09:16:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:13,312 INFO L225 Difference]: With dead ends: 322 [2024-09-13 09:16:13,312 INFO L226 Difference]: Without dead ends: 161 [2024-09-13 09:16:13,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:16:13,313 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:13,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 355 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:16:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-13 09:16:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2024-09-13 09:16:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:16:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 216 transitions. [2024-09-13 09:16:13,383 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 216 transitions. Word has length 71 [2024-09-13 09:16:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:13,384 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 216 transitions. [2024-09-13 09:16:13,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 09:16:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 216 transitions. [2024-09-13 09:16:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:13,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:13,385 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:13,406 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:13,586 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 09:16:13,586 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-13 09:16:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:13,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155008322] [2024-09-13 09:16:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-13 09:16:13,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:13,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155008322] [2024-09-13 09:16:13,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155008322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:13,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598866231] [2024-09-13 09:16:13,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:13,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:13,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:13,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:16:13,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:13,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 09:16:13,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-13 09:16:14,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-13 09:16:14,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598866231] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:14,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:14,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-09-13 09:16:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626985300] [2024-09-13 09:16:14,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:14,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:16:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:16:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:16:14,110 INFO L87 Difference]: Start difference. First operand 160 states and 216 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-13 09:16:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:14,399 INFO L93 Difference]: Finished difference Result 216 states and 290 transitions. [2024-09-13 09:16:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 09:16:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 71 [2024-09-13 09:16:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:14,401 INFO L225 Difference]: With dead ends: 216 [2024-09-13 09:16:14,401 INFO L226 Difference]: Without dead ends: 156 [2024-09-13 09:16:14,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:16:14,402 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:14,402 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 346 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:16:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-09-13 09:16:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2024-09-13 09:16:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 89 states have internal predecessors, (100), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:16:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2024-09-13 09:16:14,443 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 71 [2024-09-13 09:16:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:14,443 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2024-09-13 09:16:14,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-13 09:16:14,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2024-09-13 09:16:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-13 09:16:14,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:14,444 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:14,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 09:16:14,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 09:16:14,649 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-13 09:16:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:14,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651766432] [2024-09-13 09:16:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:14,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609109794] [2024-09-13 09:16:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:14,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:16:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:14,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 09:16:14,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-13 09:16:15,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-13 09:16:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651766432] [2024-09-13 09:16:17,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609109794] [2024-09-13 09:16:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609109794] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:17,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-09-13 09:16:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377388113] [2024-09-13 09:16:17,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:17,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 09:16:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 09:16:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:16:17,539 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-13 09:16:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:19,653 INFO L93 Difference]: Finished difference Result 185 states and 252 transitions. [2024-09-13 09:16:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:16:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 85 [2024-09-13 09:16:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:19,655 INFO L225 Difference]: With dead ends: 185 [2024-09-13 09:16:19,655 INFO L226 Difference]: Without dead ends: 171 [2024-09-13 09:16:19,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 09:16:19,656 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 55 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:19,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 713 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 09:16:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-13 09:16:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2024-09-13 09:16:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 86 states have internal predecessors, (96), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:16:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2024-09-13 09:16:19,708 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 85 [2024-09-13 09:16:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:19,709 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2024-09-13 09:16:19,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-13 09:16:19,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2024-09-13 09:16:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 09:16:19,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:19,710 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:19,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:19,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 09:16:19,914 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:19,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1726226259, now seen corresponding path program 2 times [2024-09-13 09:16:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458927820] [2024-09-13 09:16:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:19,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484752685] [2024-09-13 09:16:19,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:19,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:19,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:19,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 09:16:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:19,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:19,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 09:16:19,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-13 09:16:20,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:26,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458927820] [2024-09-13 09:16:26,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484752685] [2024-09-13 09:16:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484752685] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:26,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:26,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 09:16:26,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504661896] [2024-09-13 09:16:26,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:26,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 09:16:26,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 09:16:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 09:16:26,395 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 09:16:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:27,301 INFO L93 Difference]: Finished difference Result 230 states and 317 transitions. [2024-09-13 09:16:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 09:16:27,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 90 [2024-09-13 09:16:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:27,304 INFO L225 Difference]: With dead ends: 230 [2024-09-13 09:16:27,305 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 09:16:27,305 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 09:16:27,306 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 81 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:27,306 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 661 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 09:16:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 09:16:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2024-09-13 09:16:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 120 states have internal predecessors, (138), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2024-09-13 09:16:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 302 transitions. [2024-09-13 09:16:27,411 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 302 transitions. Word has length 90 [2024-09-13 09:16:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:27,411 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 302 transitions. [2024-09-13 09:16:27,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 09:16:27,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 302 transitions. [2024-09-13 09:16:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-13 09:16:27,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:27,413 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:27,440 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 09:16:27,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 09:16:27,614 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1364880258, now seen corresponding path program 1 times [2024-09-13 09:16:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:27,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263020617] [2024-09-13 09:16:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-13 09:16:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 09:16:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 09:16:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 09:16:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-13 09:16:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-13 09:16:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-13 09:16:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:27,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263020617] [2024-09-13 09:16:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263020617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:27,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863326611] [2024-09-13 09:16:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:27,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:27,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:27,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 09:16:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:27,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 09:16:27,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-09-13 09:16:27,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-13 09:16:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863326611] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:28,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-09-13 09:16:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183391356] [2024-09-13 09:16:28,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:28,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 09:16:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 09:16:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-09-13 09:16:28,193 INFO L87 Difference]: Start difference. First operand 216 states and 302 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2024-09-13 09:16:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:28,537 INFO L93 Difference]: Finished difference Result 238 states and 319 transitions. [2024-09-13 09:16:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:16:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) Word has length 93 [2024-09-13 09:16:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:28,540 INFO L225 Difference]: With dead ends: 238 [2024-09-13 09:16:28,540 INFO L226 Difference]: Without dead ends: 178 [2024-09-13 09:16:28,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2024-09-13 09:16:28,541 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:28,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 388 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-13 09:16:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-09-13 09:16:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 100 states have internal predecessors, (117), 67 states have call successors, (67), 12 states have call predecessors, (67), 11 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2024-09-13 09:16:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 249 transitions. [2024-09-13 09:16:28,646 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 249 transitions. Word has length 93 [2024-09-13 09:16:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:28,646 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 249 transitions. [2024-09-13 09:16:28,646 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2024-09-13 09:16:28,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 249 transitions. [2024-09-13 09:16:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 09:16:28,647 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:28,647 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:28,661 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:28,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:28,849 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:28,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-13 09:16:28,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209944096] [2024-09-13 09:16:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:28,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:28,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:28,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 09:16:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 09:16:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 09:16:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-13 09:16:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-13 09:16:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-13 09:16:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-13 09:16:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209944096] [2024-09-13 09:16:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209944096] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:29,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340271357] [2024-09-13 09:16:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:29,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:29,043 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:29,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 09:16:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:29,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 09:16:29,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-09-13 09:16:29,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-13 09:16:29,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340271357] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:29,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-09-13 09:16:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659859102] [2024-09-13 09:16:29,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:29,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 09:16:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 09:16:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:16:29,396 INFO L87 Difference]: Start difference. First operand 178 states and 249 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-13 09:16:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:29,660 INFO L93 Difference]: Finished difference Result 235 states and 312 transitions. [2024-09-13 09:16:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 09:16:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 98 [2024-09-13 09:16:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:29,661 INFO L225 Difference]: With dead ends: 235 [2024-09-13 09:16:29,661 INFO L226 Difference]: Without dead ends: 123 [2024-09-13 09:16:29,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 212 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-09-13 09:16:29,662 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:29,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 448 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-13 09:16:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-09-13 09:16:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 72 states have internal predecessors, (77), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-13 09:16:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2024-09-13 09:16:29,718 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 98 [2024-09-13 09:16:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:29,718 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2024-09-13 09:16:29,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-13 09:16:29,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2024-09-13 09:16:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 09:16:29,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:29,720 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:29,732 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 09:16:29,923 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:29,924 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:29,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 624981413, now seen corresponding path program 2 times [2024-09-13 09:16:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928515374] [2024-09-13 09:16:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 09:16:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 09:16:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 09:16:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-13 09:16:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-13 09:16:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-13 09:16:30,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:30,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928515374] [2024-09-13 09:16:30,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928515374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:30,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119932828] [2024-09-13 09:16:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:30,151 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 09:16:30,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:30,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:30,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 09:16:30,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-09-13 09:16:30,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-13 09:16:30,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119932828] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:30,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2024-09-13 09:16:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863608396] [2024-09-13 09:16:30,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:30,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 09:16:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 09:16:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:16:30,736 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-13 09:16:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:31,268 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2024-09-13 09:16:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 09:16:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) Word has length 98 [2024-09-13 09:16:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:31,269 INFO L225 Difference]: With dead ends: 138 [2024-09-13 09:16:31,269 INFO L226 Difference]: Without dead ends: 73 [2024-09-13 09:16:31,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 09:16:31,271 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:31,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 426 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:16:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-13 09:16:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-13 09:16:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 9 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 09:16:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-09-13 09:16:31,309 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 98 [2024-09-13 09:16:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:31,309 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-09-13 09:16:31,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-13 09:16:31,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-09-13 09:16:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-13 09:16:31,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:31,310 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:31,323 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:31,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:31,515 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:31,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 3 times [2024-09-13 09:16:31,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:31,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591850144] [2024-09-13 09:16:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 09:16:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 09:16:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 09:16:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-13 09:16:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-13 09:16:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-13 09:16:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-13 09:16:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-13 09:16:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-09-13 09:16:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591850144] [2024-09-13 09:16:31,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591850144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269493958] [2024-09-13 09:16:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:16:31,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:31,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:31,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:31,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 09:16:31,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:16:31,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:31,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 09:16:31,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 71 proven. 20 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-09-13 09:16:33,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:34,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269493958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:34,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:34,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 28 [2024-09-13 09:16:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541566314] [2024-09-13 09:16:34,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:34,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 09:16:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 09:16:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 09:16:34,985 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2024-09-13 09:16:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:35,675 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2024-09-13 09:16:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 09:16:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) Word has length 112 [2024-09-13 09:16:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:35,676 INFO L225 Difference]: With dead ends: 77 [2024-09-13 09:16:35,676 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 09:16:35,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 09:16:35,677 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:35,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:16:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 09:16:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 09:16:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 09:16:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 09:16:35,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2024-09-13 09:16:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:35,679 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 09:16:35,679 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2024-09-13 09:16:35,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 09:16:35,679 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 09:16:35,681 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-13 09:16:35,689 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 09:16:35,882 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 09:16:35,885 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:35,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-13 09:16:42,456 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 09:16:42,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 09:16:42 BoogieIcfgContainer [2024-09-13 09:16:42,473 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 09:16:42,473 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-13 09:16:42,473 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-13 09:16:42,473 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-13 09:16:42,474 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:15:58" (3/4) ... [2024-09-13 09:16:42,475 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-13 09:16:42,477 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-13 09:16:42,478 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-13 09:16:42,478 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-13 09:16:42,478 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-13 09:16:42,481 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2024-09-13 09:16:42,481 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-13 09:16:42,481 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-13 09:16:42,481 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-13 09:16:42,557 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-13 09:16:42,558 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-13 09:16:42,558 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-13 09:16:42,558 INFO L158 Benchmark]: Toolchain (without parser) took 44446.85ms. Allocated memory was 213.9MB in the beginning and 604.0MB in the end (delta: 390.1MB). Free memory was 144.9MB in the beginning and 266.7MB in the end (delta: -121.9MB). Peak memory consumption was 269.6MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,558 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 213.9MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 09:16:42,559 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.62ms. Allocated memory is still 213.9MB. Free memory was 144.6MB in the beginning and 132.6MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.65ms. Allocated memory is still 213.9MB. Free memory was 132.6MB in the beginning and 131.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,559 INFO L158 Benchmark]: Boogie Preprocessor took 34.08ms. Allocated memory is still 213.9MB. Free memory was 131.6MB in the beginning and 129.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,559 INFO L158 Benchmark]: RCFGBuilder took 269.36ms. Allocated memory is still 213.9MB. Free memory was 129.6MB in the beginning and 115.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,560 INFO L158 Benchmark]: TraceAbstraction took 43797.93ms. Allocated memory was 213.9MB in the beginning and 604.0MB in the end (delta: 390.1MB). Free memory was 114.6MB in the beginning and 271.0MB in the end (delta: -156.4MB). Peak memory consumption was 296.9MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,560 INFO L158 Benchmark]: Witness Printer took 84.72ms. Allocated memory is still 604.0MB. Free memory was 271.0MB in the beginning and 266.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-13 09:16:42,561 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 213.9MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.62ms. Allocated memory is still 213.9MB. Free memory was 144.6MB in the beginning and 132.6MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.65ms. Allocated memory is still 213.9MB. Free memory was 132.6MB in the beginning and 131.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.08ms. Allocated memory is still 213.9MB. Free memory was 131.6MB in the beginning and 129.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 269.36ms. Allocated memory is still 213.9MB. Free memory was 129.6MB in the beginning and 115.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 43797.93ms. Allocated memory was 213.9MB in the beginning and 604.0MB in the end (delta: 390.1MB). Free memory was 114.6MB in the beginning and 271.0MB in the end (delta: -156.4MB). Peak memory consumption was 296.9MB. Max. memory is 16.1GB. * Witness Printer took 84.72ms. Allocated memory is still 604.0MB. Free memory was 271.0MB in the beginning and 266.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.2s, OverallIterations: 22, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 11.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1075 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1006 mSDsluCounter, 6590 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5654 mSDsCounter, 669 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4848 IncrementalHoareTripleChecker+Invalid, 5517 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 669 mSolverCounterUnsat, 936 mSDtfsCounter, 4848 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2584 GetRequests, 2151 SyntacticMatches, 34 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=11, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 347 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 2629 NumberOfCodeBlocks, 2582 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 2815 ConstructedInterpolants, 0 QuantifiedInterpolants, 11962 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2989 ConjunctsInSsa, 410 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 4409/4834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (v == 1)) && (x == 1)) && (d == 1)) && (a == 2)) && (q == 1)) || (((((((((((((v == ((__int128) d * b)) && (r == 0)) && (k == 0)) && (v <= c)) && (s == 1)) && (b == y)) && (b <= c)) && (q == 0)) && (1 <= y)) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || (((((((((((((y == 2) && (b == 1)) && (v <= 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (x == 1)) && ((d % 2) == 0)) && (a == 2)) && (q == 1)) && (d == v))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (x == 1)) && (v == 2)) && (d == 2)) && (a == 2)) && (q == 1))) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((b == 1) && (s == 0)) && (p == 0)) && (r == 1)) && (a == y)) && (x == 1)) && (a == 2)) && (q == 1)) || ((((((((1 <= x) && (y <= 2)) && (b == 0)) && (((((__int128) q * x) + a) + ((__int128) y * s)) == (((__int128) y * r) + ((__int128) p * x)))) && (a == (((__int128) y * r) + ((__int128) p * x)))) && (1 <= a)) && (1 <= y)) && (x <= 2))) || ((((((((((r == 0) && (y <= 2)) && (s == 1)) && (1 <= a)) && (b == y)) && (q == 0)) && (1 <= y)) && (a == x)) && (x <= 2)) && (p == 1))) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((r == 0) && (s == 1)) && (((__int128) c + 1) <= ((__int128) b * 2))) && (1 <= a)) && (b == y)) && (q == 0)) && (c == 0)) && (a == x)) && ((y + ((__int128) k * y)) == (b + x))) && (x <= 2)) && (p == 1)) || ((((((((((b == 1) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (a == y)) && (c == 2)) && (x == 1)) && (a == 2)) && (q == 1))) || ((((((((((((r == 0) && (y <= 2)) && (k == 0)) && (s == 1)) && (1 <= a)) && (b == y)) && (q == 0)) && (1 <= y)) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || ((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (r == 1)) && (x == 1)) && (k == 2)) && (a == 2)) && (c == 0)) && (q == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-13 09:16:42,597 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE