./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:53:30,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:53:30,277 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:53:30,284 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:53:30,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:53:30,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:53:30,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:53:30,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:53:30,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:53:30,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:53:30,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:53:30,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:53:30,332 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:53:30,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:53:30,333 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:53:30,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:53:30,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:53:30,336 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:53:30,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:53:30,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:53:30,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:53:30,338 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:53:30,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:53:30,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:53:30,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:53:30,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:53:30,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:53:30,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:53:30,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:53:30,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:53:30,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:53:30,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:53:30,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:53:30,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:53:30,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:53:30,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:53:30,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:53:30,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:53:30,345 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:53:30,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:53:30,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:53:30,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:53:30,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:53:30,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:53:30,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:53:30,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:53:30,671 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:53:30,672 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:53:30,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-18 15:53:32,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:53:32,274 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:53:32,275 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-18 15:53:32,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4e16db0fb/14e23d21cc6d455e80b088fa55993f7e/FLAG76fbb09ea [2024-09-18 15:53:32,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4e16db0fb/14e23d21cc6d455e80b088fa55993f7e [2024-09-18 15:53:32,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:53:32,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:53:32,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:53:32,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:53:32,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:53:32,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1470dfa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32, skipping insertion in model container [2024-09-18 15:53:32,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,320 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:53:32,466 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-09-18 15:53:32,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:53:32,504 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:53:32,515 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-09-18 15:53:32,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:53:32,547 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:53:32,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32 WrapperNode [2024-09-18 15:53:32,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:53:32,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:53:32,550 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:53:32,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:53:32,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,563 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,574 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:53:32,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:53:32,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:53:32,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:53:32,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:53:32,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,593 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,604 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]. [2024-09-18 15:53:32,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,608 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,612 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:53:32,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:53:32,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:53:32,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:53:32,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (1/1) ... [2024-09-18 15:53:32,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:53:32,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:32,666 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) [2024-09-18 15:53:32,668 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 [2024-09-18 15:53:32,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:53:32,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:53:32,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:53:32,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:53:32,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:53:32,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:53:32,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:53:32,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:53:32,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:53:32,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:53:32,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:53:32,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:53:32,765 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:53:32,767 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:53:32,958 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:53:32,959 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:53:32,977 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:53:32,977 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:53:32,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:53:32 BoogieIcfgContainer [2024-09-18 15:53:32,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:53:32,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:53:32,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:53:32,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:53:32,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:53:32" (1/3) ... [2024-09-18 15:53:32,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76da5804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:53:32, skipping insertion in model container [2024-09-18 15:53:32,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:32" (2/3) ... [2024-09-18 15:53:32,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76da5804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:53:32, skipping insertion in model container [2024-09-18 15:53:32,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:53:32" (3/3) ... [2024-09-18 15:53:32,986 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-09-18 15:53:33,004 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:53:33,006 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:53:33,053 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:53:33,059 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;@33832876, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:53:33,060 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:53:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:53:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:53:33,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:33,071 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:33,073 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:33,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-18 15:53:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:33,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590844638] [2024-09-18 15:53:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:33,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590844638] [2024-09-18 15:53:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590844638] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:53:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224627762] [2024-09-18 15:53:33,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:33,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:53:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:53:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:53:33,291 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:53:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:33,329 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-18 15:53:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:53:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-18 15:53:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:33,339 INFO L225 Difference]: With dead ends: 58 [2024-09-18 15:53:33,339 INFO L226 Difference]: Without dead ends: 29 [2024-09-18 15:53:33,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:53:33,344 INFO L434 NwaCegarLoop]: 39 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, 39 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 [2024-09-18 15:53:33,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-18 15:53:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-18 15:53:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 15:53:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-18 15:53:33,390 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-18 15:53:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:33,390 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-18 15:53:33,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:53:33,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-18 15:53:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:53:33,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:33,394 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:33,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:53:33,395 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:33,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-18 15:53:33,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:33,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005561052] [2024-09-18 15:53:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005561052] [2024-09-18 15:53:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005561052] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:33,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620814681] [2024-09-18 15:53:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:33,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:33,611 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:53:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:33,696 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-18 15:53:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-18 15:53:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:33,699 INFO L225 Difference]: With dead ends: 42 [2024-09-18 15:53:33,699 INFO L226 Difference]: Without dead ends: 40 [2024-09-18 15:53:33,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:33,701 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:33,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-18 15:53:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-18 15:53:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 15:53:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-18 15:53:33,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-18 15:53:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:33,713 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-18 15:53:33,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:53:33,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-18 15:53:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:53:33,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:33,715 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:33,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:53:33,716 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:33,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-18 15:53:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:33,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996836578] [2024-09-18 15:53:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:53:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:33,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:33,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996836578] [2024-09-18 15:53:33,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996836578] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:33,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:33,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475691876] [2024-09-18 15:53:33,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:33,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:33,877 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:33,968 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-18 15:53:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-18 15:53:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:33,970 INFO L225 Difference]: With dead ends: 46 [2024-09-18 15:53:33,971 INFO L226 Difference]: Without dead ends: 44 [2024-09-18 15:53:33,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:33,973 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:33,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-18 15:53:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-18 15:53:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 15:53:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-18 15:53:33,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-18 15:53:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:33,991 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-18 15:53:33,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-18 15:53:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:53:33,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:33,994 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:33,994 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:53:33,995 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:33,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-18 15:53:33,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565126166] [2024-09-18 15:53:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:34,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806058982] [2024-09-18 15:53:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:34,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:34,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:34,029 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) [2024-09-18 15:53:34,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:53:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:34,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:53:34,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:53:34,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:53:34,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565126166] [2024-09-18 15:53:34,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806058982] [2024-09-18 15:53:34,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806058982] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:34,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:34,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393554764] [2024-09-18 15:53:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:34,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:34,229 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:34,326 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-18 15:53:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-18 15:53:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:34,330 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:53:34,331 INFO L226 Difference]: Without dead ends: 50 [2024-09-18 15:53:34,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:34,333 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:34,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-18 15:53:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-18 15:53:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 15:53:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-18 15:53:34,355 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-18 15:53:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:34,356 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-18 15:53:34,356 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:34,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-18 15:53:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:53:34,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:34,359 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-18 15:53:34,375 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:53:34,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:34,560 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:34,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-18 15:53:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:34,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899882633] [2024-09-18 15:53:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161351640] [2024-09-18 15:53:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:34,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:34,584 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) [2024-09-18 15:53:34,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:53:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:34,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 15:53:34,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:53:34,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:53:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899882633] [2024-09-18 15:53:34,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161351640] [2024-09-18 15:53:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161351640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:34,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:34,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-18 15:53:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488119237] [2024-09-18 15:53:34,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:34,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:53:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:53:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:53:34,964 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 15:53:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:35,103 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-18 15:53:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:53:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2024-09-18 15:53:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:35,106 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:53:35,106 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:53:35,106 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:53:35,107 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:35,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 140 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:53:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-09-18 15:53:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:53:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-18 15:53:35,125 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-18 15:53:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:35,126 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-18 15:53:35,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-18 15:53:35,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-18 15:53:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:53:35,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:35,128 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:35,144 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:53:35,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:35,329 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:35,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:35,329 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-18 15:53:35,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:35,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577306345] [2024-09-18 15:53:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:35,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:35,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029318451] [2024-09-18 15:53:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:35,348 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) [2024-09-18 15:53:35,350 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:53:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:35,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:53:35,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:53:35,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-18 15:53:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577306345] [2024-09-18 15:53:35,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029318451] [2024-09-18 15:53:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029318451] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-18 15:53:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345311150] [2024-09-18 15:53:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:35,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:53:35,591 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:53:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:35,656 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-18 15:53:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-09-18 15:53:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:35,658 INFO L225 Difference]: With dead ends: 70 [2024-09-18 15:53:35,658 INFO L226 Difference]: Without dead ends: 68 [2024-09-18 15:53:35,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:53:35,659 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:35,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-18 15:53:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-18 15:53:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-18 15:53:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-18 15:53:35,686 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-18 15:53:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:35,686 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-18 15:53:35,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:53:35,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-18 15:53:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-18 15:53:35,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:35,690 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-18 15:53:35,706 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:53:35,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:53:35,895 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:35,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-18 15:53:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863754177] [2024-09-18 15:53:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:53:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:53:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:53:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:53:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:53:36,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863754177] [2024-09-18 15:53:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863754177] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:36,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:36,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255013095] [2024-09-18 15:53:36,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:36,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:36,076 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-18 15:53:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:36,142 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-18 15:53:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 49 [2024-09-18 15:53:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:36,144 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:53:36,144 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:53:36,145 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:36,145 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:36,146 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:53:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 15:53:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:53:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-18 15:53:36,167 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-18 15:53:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:36,170 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-18 15:53:36,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-18 15:53:36,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-18 15:53:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-18 15:53:36,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:36,171 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-09-18 15:53:36,172 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-18 15:53:36,172 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:36,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-18 15:53:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784408031] [2024-09-18 15:53:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614674345] [2024-09-18 15:53:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:36,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:36,213 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) [2024-09-18 15:53:36,215 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:53:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:36,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:53:36,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:53:36,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:53:38,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:38,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784408031] [2024-09-18 15:53:38,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:38,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614674345] [2024-09-18 15:53:38,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614674345] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:38,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:38,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-18 15:53:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76376236] [2024-09-18 15:53:38,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:38,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:53:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:53:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:53:38,721 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-18 15:53:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:39,987 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2024-09-18 15:53:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:53:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 63 [2024-09-18 15:53:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:39,990 INFO L225 Difference]: With dead ends: 150 [2024-09-18 15:53:39,990 INFO L226 Difference]: Without dead ends: 127 [2024-09-18 15:53:39,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:53:39,991 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:39,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 244 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:53:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-18 15:53:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2024-09-18 15:53:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-18 15:53:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2024-09-18 15:53:40,037 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 63 [2024-09-18 15:53:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:40,037 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2024-09-18 15:53:40,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-18 15:53:40,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2024-09-18 15:53:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-18 15:53:40,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:40,041 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:40,059 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:40,245 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,246 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:40,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-18 15:53:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:40,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778647728] [2024-09-18 15:53:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:40,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124356042] [2024-09-18 15:53:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:40,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:40,283 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) [2024-09-18 15:53:40,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:53:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:40,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:53:40,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:53:40,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:53:41,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:41,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778647728] [2024-09-18 15:53:41,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:41,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124356042] [2024-09-18 15:53:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124356042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:41,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:41,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-18 15:53:41,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787568598] [2024-09-18 15:53:41,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:41,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:53:41,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:53:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:53:41,439 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-18 15:53:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:41,928 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2024-09-18 15:53:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:53:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 74 [2024-09-18 15:53:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:41,932 INFO L225 Difference]: With dead ends: 142 [2024-09-18 15:53:41,932 INFO L226 Difference]: Without dead ends: 108 [2024-09-18 15:53:41,932 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:53:41,933 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:41,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:53:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-18 15:53:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-09-18 15:53:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-18 15:53:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2024-09-18 15:53:41,970 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 74 [2024-09-18 15:53:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:41,970 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2024-09-18 15:53:41,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-18 15:53:41,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2024-09-18 15:53:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-18 15:53:41,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:41,977 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-09-18 15:53:41,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:53:42,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,181 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:42,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -739625270, now seen corresponding path program 2 times [2024-09-18 15:53:42,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:42,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159245412] [2024-09-18 15:53:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:53:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:53:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:53:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:53:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:53:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:53:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:53:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:53:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:53:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159245412] [2024-09-18 15:53:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159245412] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563965924] [2024-09-18 15:53:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:42,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:42,456 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) [2024-09-18 15:53:42,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:53:42,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:42,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:42,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:53:42,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:53:42,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:53:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563965924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:42,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-18 15:53:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452983510] [2024-09-18 15:53:42,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:42,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:42,640 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-09-18 15:53:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:42,722 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-18 15:53:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:53:42,722 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), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 76 [2024-09-18 15:53:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:42,724 INFO L225 Difference]: With dead ends: 121 [2024-09-18 15:53:42,726 INFO L226 Difference]: Without dead ends: 99 [2024-09-18 15:53:42,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:42,727 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:42,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-18 15:53:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-18 15:53:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 15:53:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-09-18 15:53:42,767 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 76 [2024-09-18 15:53:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:42,768 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-09-18 15:53:42,768 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), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-09-18 15:53:42,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-09-18 15:53:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-18 15:53:42,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:42,770 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-09-18 15:53:42,787 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:53:42,970 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 15:53:42,971 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:42,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-18 15:53:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622965192] [2024-09-18 15:53:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:53:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:53:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:53:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:53:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:53:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:53:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:53:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:53:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 15:53:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:43,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622965192] [2024-09-18 15:53:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622965192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689277456] [2024-09-18 15:53:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:43,327 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) [2024-09-18 15:53:43,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:53:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 15:53:43,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:43,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689277456] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:44,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:44,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-18 15:53:44,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567733743] [2024-09-18 15:53:44,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:44,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:53:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:53:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:53:44,090 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-18 15:53:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:44,378 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2024-09-18 15:53:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 15:53:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 79 [2024-09-18 15:53:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:44,380 INFO L225 Difference]: With dead ends: 114 [2024-09-18 15:53:44,381 INFO L226 Difference]: Without dead ends: 97 [2024-09-18 15:53:44,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:53:44,384 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:44,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 338 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:53:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-18 15:53:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-09-18 15:53:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-18 15:53:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-09-18 15:53:44,415 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 79 [2024-09-18 15:53:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:44,416 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-09-18 15:53:44,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-18 15:53:44,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-09-18 15:53:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-18 15:53:44,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:44,417 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:44,436 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:44,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:44,618 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:44,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1075113258, now seen corresponding path program 1 times [2024-09-18 15:53:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080672654] [2024-09-18 15:53:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:44,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:53:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:53:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:53:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:53:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:53:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:53:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:53:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:53:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:53:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 15:53:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:53:44,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:44,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080672654] [2024-09-18 15:53:44,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080672654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:44,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042521622] [2024-09-18 15:53:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:44,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:44,744 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) [2024-09-18 15:53:44,746 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:53:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:44,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:53:44,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-18 15:53:44,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:53:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042521622] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:44,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:44,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-18 15:53:44,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979897088] [2024-09-18 15:53:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:44,833 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:44,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:44,834 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-18 15:53:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:44,919 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-09-18 15:53:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2024-09-18 15:53:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:44,920 INFO L225 Difference]: With dead ends: 97 [2024-09-18 15:53:44,920 INFO L226 Difference]: Without dead ends: 85 [2024-09-18 15:53:44,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:44,921 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:44,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-18 15:53:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-09-18 15:53:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-18 15:53:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2024-09-18 15:53:44,949 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 83 [2024-09-18 15:53:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:44,950 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2024-09-18 15:53:44,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-18 15:53:44,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2024-09-18 15:53:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-18 15:53:44,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:44,953 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:44,972 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:53:45,153 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:45,154 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:45,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 3 times [2024-09-18 15:53:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967400660] [2024-09-18 15:53:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:45,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:45,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919980207] [2024-09-18 15:53:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:53:45,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:45,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:45,196 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) [2024-09-18 15:53:45,198 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:53:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:53:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:45,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:53:45,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-18 15:53:45,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-18 15:53:58,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:58,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967400660] [2024-09-18 15:53:58,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:58,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919980207] [2024-09-18 15:53:58,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919980207] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:58,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:58,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-09-18 15:53:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112636630] [2024-09-18 15:53:58,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:58,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:53:58,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:53:58,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:53:58,438 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-09-18 15:54:03,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:04,416 INFO L93 Difference]: Finished difference Result 165 states and 216 transitions. [2024-09-18 15:54:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:54:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 93 [2024-09-18 15:54:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:04,418 INFO L225 Difference]: With dead ends: 165 [2024-09-18 15:54:04,418 INFO L226 Difference]: Without dead ends: 143 [2024-09-18 15:54:04,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:54:04,419 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:04,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-18 15:54:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-18 15:54:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2024-09-18 15:54:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.144736842105263) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-18 15:54:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2024-09-18 15:54:04,477 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 93 [2024-09-18 15:54:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:04,477 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2024-09-18 15:54:04,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-09-18 15:54:04,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2024-09-18 15:54:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-18 15:54:04,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:04,481 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:04,494 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:54:04,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:54:04,683 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 644553835, now seen corresponding path program 2 times [2024-09-18 15:54:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877582478] [2024-09-18 15:54:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:04,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181276171] [2024-09-18 15:54:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:04,732 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) [2024-09-18 15:54:04,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:54:04,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:04,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:54:04,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:54:06,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:54:15,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877582478] [2024-09-18 15:54:15,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181276171] [2024-09-18 15:54:15,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181276171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:15,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:54:15,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-09-18 15:54:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347285589] [2024-09-18 15:54:15,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:15,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-18 15:54:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-18 15:54:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:54:15,140 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-09-18 15:54:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:18,034 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-09-18 15:54:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:54:18,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) Word has length 104 [2024-09-18 15:54:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:18,037 INFO L225 Difference]: With dead ends: 151 [2024-09-18 15:54:18,038 INFO L226 Difference]: Without dead ends: 149 [2024-09-18 15:54:18,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 15:54:18,039 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:18,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 551 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:54:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-18 15:54:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2024-09-18 15:54:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 88 states have internal predecessors, (96), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-18 15:54:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2024-09-18 15:54:18,098 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 104 [2024-09-18 15:54:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:18,098 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2024-09-18 15:54:18,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-09-18 15:54:18,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2024-09-18 15:54:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-18 15:54:18,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:18,100 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:18,113 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:54:18,302 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 [2024-09-18 15:54:18,302 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:18,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:18,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243655, now seen corresponding path program 4 times [2024-09-18 15:54:18,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:18,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387222087] [2024-09-18 15:54:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:54:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:54:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:54:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:54:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:54:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:54:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:54:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:54:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:54:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:54:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:54:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:54:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:54:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:54:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 15:54:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:54:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:54:18,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387222087] [2024-09-18 15:54:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387222087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963173619] [2024-09-18 15:54:18,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:54:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:18,598 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) [2024-09-18 15:54:18,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:54:18,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:54:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:18,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:54:18,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:54:18,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:54:18,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963173619] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:18,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:54:18,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-18 15:54:18,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004891543] [2024-09-18 15:54:18,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:18,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:54:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:54:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:54:18,883 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-09-18 15:54:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:19,029 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-09-18 15:54:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:54:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 106 [2024-09-18 15:54:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:19,032 INFO L225 Difference]: With dead ends: 163 [2024-09-18 15:54:19,032 INFO L226 Difference]: Without dead ends: 141 [2024-09-18 15:54:19,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:54:19,034 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:19,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 247 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:54:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-18 15:54:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-09-18 15:54:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 88 states have internal predecessors, (94), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-18 15:54:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2024-09-18 15:54:19,105 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 106 [2024-09-18 15:54:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:19,106 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2024-09-18 15:54:19,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-09-18 15:54:19,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2024-09-18 15:54:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-18 15:54:19,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:19,109 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:19,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 15:54:19,309 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 [2024-09-18 15:54:19,310 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1191181482, now seen corresponding path program 2 times [2024-09-18 15:54:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276710002] [2024-09-18 15:54:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:54:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:54:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:54:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:54:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:54:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:54:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:54:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:54:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:54:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:54:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:54:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:54:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:54:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:54:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 15:54:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:54:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:54:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:19,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:19,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276710002] [2024-09-18 15:54:19,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276710002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:19,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128782734] [2024-09-18 15:54:19,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:19,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:19,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:19,756 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) [2024-09-18 15:54:19,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:54:19,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:19,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:54:19,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:20,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128782734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:21,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:54:21,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 25 [2024-09-18 15:54:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094837621] [2024-09-18 15:54:21,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:21,122 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 15:54:21,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:21,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 15:54:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:54:21,123 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-09-18 15:54:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:21,623 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2024-09-18 15:54:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:54:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) Word has length 109 [2024-09-18 15:54:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:21,624 INFO L225 Difference]: With dead ends: 157 [2024-09-18 15:54:21,624 INFO L226 Difference]: Without dead ends: 121 [2024-09-18 15:54:21,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:54:21,625 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:21,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 563 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:54:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-18 15:54:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-18 15:54:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 71 states have internal predecessors, (77), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-18 15:54:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-09-18 15:54:21,666 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 109 [2024-09-18 15:54:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:21,666 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-09-18 15:54:21,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-09-18 15:54:21,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-09-18 15:54:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-18 15:54:21,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:21,668 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:21,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:54:21,868 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 [2024-09-18 15:54:21,869 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:21,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash 961958804, now seen corresponding path program 3 times [2024-09-18 15:54:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536500824] [2024-09-18 15:54:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:54:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:54:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:54:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:54:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:54:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:54:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:54:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:54:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:54:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:54:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:54:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:54:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-18 15:54:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-18 15:54:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:54:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-18 15:54:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-18 15:54:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-18 15:54:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-18 15:54:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:54:22,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536500824] [2024-09-18 15:54:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536500824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484980582] [2024-09-18 15:54:22,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:22,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:22,067 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) [2024-09-18 15:54:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:54:22,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:54:22,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:22,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:54:22,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-18 15:54:22,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-18 15:54:22,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484980582] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:22,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:54:22,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 8] total 21 [2024-09-18 15:54:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400576260] [2024-09-18 15:54:22,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:22,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:54:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:54:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:54:22,563 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-09-18 15:54:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:23,651 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2024-09-18 15:54:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:54:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) Word has length 121 [2024-09-18 15:54:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:23,653 INFO L225 Difference]: With dead ends: 142 [2024-09-18 15:54:23,653 INFO L226 Difference]: Without dead ends: 134 [2024-09-18 15:54:23,653 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:54:23,654 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:23,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 441 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:54:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-18 15:54:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-09-18 15:54:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.108433734939759) internal successors, (92), 85 states have internal predecessors, (92), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-18 15:54:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-09-18 15:54:23,709 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 121 [2024-09-18 15:54:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:23,709 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-09-18 15:54:23,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-09-18 15:54:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-09-18 15:54:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-18 15:54:23,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:23,711 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:23,727 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:23,915 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 [2024-09-18 15:54:23,916 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:23,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1692740848, now seen corresponding path program 5 times [2024-09-18 15:54:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894642845] [2024-09-18 15:54:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:23,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536206892] [2024-09-18 15:54:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:54:23,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:23,973 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) [2024-09-18 15:54:23,975 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:54:24,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-18 15:54:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:24,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-18 15:54:24,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 71 proven. 67 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-18 15:54:24,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:57,508 WARN L293 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 382 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:57:21,796 WARN L293 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 344 DAG size of output: 338 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)