./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.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 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:43:54,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:43:54,278 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:43:54,284 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:43:54,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:43:54,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:43:54,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:43:54,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:43:54,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:43:54,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:43:54,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:43:54,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:43:54,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:43:54,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:43:54,313 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:43:54,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:43:54,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:43:54,314 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:43:54,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:43:54,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:43:54,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:43:54,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:43:54,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:43:54,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:43:54,317 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:43:54,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:43:54,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:43:54,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:43:54,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:43:54,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:43:54,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:43:54,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:43:54,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:43:54,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:43:54,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:43:54,544 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:43:54,545 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:43:54,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2024-09-11 19:43:55,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:43:55,897 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:43:55,897 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2024-09-11 19:43:55,905 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/24959a474/a60d917513ce402d91ccfd2cb0997641/FLAG053796a4b [2024-09-11 19:43:56,287 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/24959a474/a60d917513ce402d91ccfd2cb0997641 [2024-09-11 19:43:56,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:43:56,290 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:43:56,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:43:56,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:43:56,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:43:56,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f8c797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56, skipping insertion in model container [2024-09-11 19:43:56,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:43:56,428 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2024-09-11 19:43:56,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:43:56,452 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:43:56,461 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2024-09-11 19:43:56,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:43:56,495 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:43:56,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56 WrapperNode [2024-09-11 19:43:56,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:43:56,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:43:56,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:43:56,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:43:56,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,533 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-09-11 19:43:56,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:43:56,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:43:56,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:43:56,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:43:56,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,544 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,557 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]. [2024-09-11 19:43:56,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:43:56,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:43:56,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:43:56,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:43:56,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (1/1) ... [2024-09-11 19:43:56,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:43:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:56,602 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) [2024-09-11 19:43:56,603 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 [2024-09-11 19:43:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:43:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:43:56,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:43:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:43:56,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:43:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:43:56,679 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:43:56,680 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:43:56,799 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-11 19:43:56,799 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:43:56,823 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:43:56,823 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 19:43:56,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:43:56 BoogieIcfgContainer [2024-09-11 19:43:56,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:43:56,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:43:56,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:43:56,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:43:56,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:43:56" (1/3) ... [2024-09-11 19:43:56,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44169663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:43:56, skipping insertion in model container [2024-09-11 19:43:56,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:43:56" (2/3) ... [2024-09-11 19:43:56,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44169663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:43:56, skipping insertion in model container [2024-09-11 19:43:56,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:43:56" (3/3) ... [2024-09-11 19:43:56,831 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2024-09-11 19:43:56,842 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:43:56,842 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:43:56,884 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:43:56,890 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;@6932185f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:43:56,890 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:43:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 19:43:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:43:56,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:56,898 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:56,899 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:56,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2080946738, now seen corresponding path program 1 times [2024-09-11 19:43:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:56,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435003] [2024-09-11 19:43:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:43:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435003] [2024-09-11 19:43:57,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435003] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:43:57,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:43:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:43:57,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166249631] [2024-09-11 19:43:57,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:43:57,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:43:57,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:43:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:43:57,049 INFO L87 Difference]: Start difference. First operand has 24 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:43:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:57,085 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2024-09-11 19:43:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:43:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:43:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:57,092 INFO L225 Difference]: With dead ends: 46 [2024-09-11 19:43:57,093 INFO L226 Difference]: Without dead ends: 22 [2024-09-11 19:43:57,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:43:57,100 INFO L434 NwaCegarLoop]: 32 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, 32 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 [2024-09-11 19:43:57,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:43:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-11 19:43:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-11 19:43:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 19:43:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-09-11 19:43:57,137 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-09-11 19:43:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:57,137 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-09-11 19:43:57,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:43:57,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-09-11 19:43:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:43:57,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:57,140 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:57,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:43:57,141 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:57,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -304390244, now seen corresponding path program 1 times [2024-09-11 19:43:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:57,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220321600] [2024-09-11 19:43:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:43:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220321600] [2024-09-11 19:43:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220321600] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:43:57,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:43:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:43:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290935652] [2024-09-11 19:43:57,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:43:57,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:43:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:43:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:43:57,337 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:43:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:57,436 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2024-09-11 19:43:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:43:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:43:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:57,438 INFO L225 Difference]: With dead ends: 28 [2024-09-11 19:43:57,438 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 19:43:57,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:43:57,439 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:57,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:43:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 19:43:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-11 19:43:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 19:43:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-09-11 19:43:57,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-09-11 19:43:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:57,467 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-09-11 19:43:57,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:43:57,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-09-11 19:43:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 19:43:57,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:57,468 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:57,468 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:43:57,469 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:57,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1112146385, now seen corresponding path program 1 times [2024-09-11 19:43:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:57,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444353372] [2024-09-11 19:43:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729146247] [2024-09-11 19:43:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:57,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:57,487 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) [2024-09-11 19:43:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:43:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:57,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:43:57,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:43:57,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:43:57,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444353372] [2024-09-11 19:43:57,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729146247] [2024-09-11 19:43:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729146247] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:43:57,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:43:57,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:43:57,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376876208] [2024-09-11 19:43:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:43:57,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:43:57,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:43:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:43:57,614 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:43:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:57,677 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2024-09-11 19:43:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:43:57,678 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-11 19:43:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:57,679 INFO L225 Difference]: With dead ends: 45 [2024-09-11 19:43:57,679 INFO L226 Difference]: Without dead ends: 43 [2024-09-11 19:43:57,679 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:43:57,680 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:57,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:43:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-11 19:43:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-11 19:43:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:43:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-09-11 19:43:57,689 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2024-09-11 19:43:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:57,689 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-09-11 19:43:57,689 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:43:57,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-09-11 19:43:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 19:43:57,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:57,690 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:57,706 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:43:57,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:57,895 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:57,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1589877564, now seen corresponding path program 1 times [2024-09-11 19:43:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:57,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122974406] [2024-09-11 19:43:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718705596] [2024-09-11 19:43:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:57,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:57,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:57,927 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) [2024-09-11 19:43:57,929 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:43:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:57,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:43:57,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:43:58,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:43:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122974406] [2024-09-11 19:43:58,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:58,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718705596] [2024-09-11 19:43:58,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718705596] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:43:58,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:43:58,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:43:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463977002] [2024-09-11 19:43:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:43:58,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:43:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:43:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:43:58,031 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:43:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:58,094 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-09-11 19:43:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:43:58,094 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-11 19:43:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:58,095 INFO L225 Difference]: With dead ends: 49 [2024-09-11 19:43:58,095 INFO L226 Difference]: Without dead ends: 47 [2024-09-11 19:43:58,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:43:58,096 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:58,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:43:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-11 19:43:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-09-11 19:43:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:43:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2024-09-11 19:43:58,106 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 18 [2024-09-11 19:43:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:58,107 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2024-09-11 19:43:58,107 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:43:58,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2024-09-11 19:43:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 19:43:58,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:58,108 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:58,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:43:58,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:58,312 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:58,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1560032783, now seen corresponding path program 1 times [2024-09-11 19:43:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939598076] [2024-09-11 19:43:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420344234] [2024-09-11 19:43:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:58,341 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) [2024-09-11 19:43:58,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:43:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:58,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:43:58,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:43:58,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:43:58,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939598076] [2024-09-11 19:43:58,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420344234] [2024-09-11 19:43:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420344234] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:43:58,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:43:58,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:43:58,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865184519] [2024-09-11 19:43:58,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:43:58,428 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:43:58,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:43:58,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:43:58,429 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 19:43:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:58,501 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-11 19:43:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:43:58,502 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-11 19:43:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:58,504 INFO L225 Difference]: With dead ends: 57 [2024-09-11 19:43:58,504 INFO L226 Difference]: Without dead ends: 45 [2024-09-11 19:43:58,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:43:58,505 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:58,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:43:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-11 19:43:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-11 19:43:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:43:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-09-11 19:43:58,525 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2024-09-11 19:43:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:58,525 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-09-11 19:43:58,526 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), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 19:43:58,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-09-11 19:43:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:43:58,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:58,527 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:58,540 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:43:58,727 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:58,727 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1769588868, now seen corresponding path program 1 times [2024-09-11 19:43:58,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:58,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290530060] [2024-09-11 19:43:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582595743] [2024-09-11 19:43:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:58,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:58,762 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) [2024-09-11 19:43:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:43:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:43:58,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 19:43:58,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:43:58,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:43:59,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:59,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290530060] [2024-09-11 19:43:59,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:59,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582595743] [2024-09-11 19:43:59,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582595743] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:43:59,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:43:59,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-11 19:43:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577596743] [2024-09-11 19:43:59,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:59,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:43:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:43:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:43:59,060 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-11 19:43:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:43:59,239 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2024-09-11 19:43:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:43:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2024-09-11 19:43:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:43:59,241 INFO L225 Difference]: With dead ends: 68 [2024-09-11 19:43:59,241 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 19:43:59,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:43:59,242 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:43:59,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:43:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 19:43:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2024-09-11 19:43:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:43:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-09-11 19:43:59,255 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 40 [2024-09-11 19:43:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:43:59,255 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-09-11 19:43:59,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-11 19:43:59,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-09-11 19:43:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 19:43:59,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:43:59,257 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:43:59,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:43:59,460 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:59,461 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:43:59,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:43:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1335110159, now seen corresponding path program 2 times [2024-09-11 19:43:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:43:59,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891658061] [2024-09-11 19:43:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:43:59,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:43:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:43:59,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316562506] [2024-09-11 19:43:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:43:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:43:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:43:59,483 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) [2024-09-11 19:43:59,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:43:59,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:43:59,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:43:59,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 19:43:59,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:43:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:43:59,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:43:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:43:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:43:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891658061] [2024-09-11 19:43:59,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:43:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316562506] [2024-09-11 19:43:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316562506] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:43:59,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:43:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-11 19:43:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590387245] [2024-09-11 19:43:59,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:43:59,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:43:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:43:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:43:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:43:59,785 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-11 19:44:03,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:44:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:04,016 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-09-11 19:44:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:44:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 45 [2024-09-11 19:44:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:04,024 INFO L225 Difference]: With dead ends: 83 [2024-09-11 19:44:04,025 INFO L226 Difference]: Without dead ends: 81 [2024-09-11 19:44:04,026 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:44:04,026 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:04,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-11 19:44:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-11 19:44:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-11 19:44:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 44 states have internal predecessors, (44), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-11 19:44:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-11 19:44:04,049 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 45 [2024-09-11 19:44:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:04,049 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-11 19:44:04,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-11 19:44:04,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-11 19:44:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-11 19:44:04,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:04,050 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:04,063 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:44:04,254 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:44:04,255 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:04,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 644018972, now seen corresponding path program 3 times [2024-09-11 19:44:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541359442] [2024-09-11 19:44:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:04,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433633230] [2024-09-11 19:44:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:44:04,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:04,280 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) [2024-09-11 19:44:04,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:44:04,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 19:44:04,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:44:04,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-11 19:44:04,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-11 19:44:04,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-11 19:44:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541359442] [2024-09-11 19:44:04,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433633230] [2024-09-11 19:44:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433633230] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:04,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:04,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-09-11 19:44:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529176700] [2024-09-11 19:44:04,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:04,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 19:44:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 19:44:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:44:04,488 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-09-11 19:44:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:04,645 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2024-09-11 19:44:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:44:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 50 [2024-09-11 19:44:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:04,646 INFO L225 Difference]: With dead ends: 95 [2024-09-11 19:44:04,646 INFO L226 Difference]: Without dead ends: 83 [2024-09-11 19:44:04,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:44:04,647 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:04,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 137 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-11 19:44:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2024-09-11 19:44:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:44:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-09-11 19:44:04,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 50 [2024-09-11 19:44:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:04,662 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-09-11 19:44:04,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-09-11 19:44:04,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-09-11 19:44:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 19:44:04,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:04,663 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:04,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:44:04,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:04,863 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:04,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 811423347, now seen corresponding path program 1 times [2024-09-11 19:44:04,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:04,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054440500] [2024-09-11 19:44:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:04,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400002783] [2024-09-11 19:44:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:04,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:04,885 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) [2024-09-11 19:44:04,887 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:44:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:04,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 19:44:04,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:44:05,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:44:05,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054440500] [2024-09-11 19:44:05,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400002783] [2024-09-11 19:44:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400002783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:05,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-11 19:44:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761246791] [2024-09-11 19:44:05,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:05,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:44:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:44:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:44:05,331 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-11 19:44:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:05,602 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2024-09-11 19:44:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:44:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 66 [2024-09-11 19:44:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:05,603 INFO L225 Difference]: With dead ends: 96 [2024-09-11 19:44:05,603 INFO L226 Difference]: Without dead ends: 94 [2024-09-11 19:44:05,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:44:05,604 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:05,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 144 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:44:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-11 19:44:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-09-11 19:44:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-11 19:44:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2024-09-11 19:44:05,629 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 66 [2024-09-11 19:44:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:05,630 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2024-09-11 19:44:05,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-11 19:44:05,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2024-09-11 19:44:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-11 19:44:05,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:05,631 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:05,644 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 19:44:05,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:05,836 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:05,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 462308408, now seen corresponding path program 1 times [2024-09-11 19:44:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697181474] [2024-09-11 19:44:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:05,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:05,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467225145] [2024-09-11 19:44:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:05,856 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) [2024-09-11 19:44:05,859 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:44:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:05,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 19:44:05,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-11 19:44:06,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-11 19:44:06,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697181474] [2024-09-11 19:44:06,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467225145] [2024-09-11 19:44:06,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467225145] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:06,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:06,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2024-09-11 19:44:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122937049] [2024-09-11 19:44:06,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:06,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:44:06,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:44:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:44:06,341 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-11 19:44:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:06,670 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-09-11 19:44:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:44:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 71 [2024-09-11 19:44:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:06,672 INFO L225 Difference]: With dead ends: 108 [2024-09-11 19:44:06,672 INFO L226 Difference]: Without dead ends: 88 [2024-09-11 19:44:06,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:44:06,673 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:06,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 177 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:44:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-11 19:44:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-11 19:44:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 19:44:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-09-11 19:44:06,703 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 71 [2024-09-11 19:44:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:06,703 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-09-11 19:44:06,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-11 19:44:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-09-11 19:44:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-11 19:44:06,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:06,704 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:06,724 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 19:44:06,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:06,905 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:06,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1954081427, now seen corresponding path program 2 times [2024-09-11 19:44:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149126981] [2024-09-11 19:44:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:06,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652336571] [2024-09-11 19:44:06,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:44:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:06,933 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) [2024-09-11 19:44:06,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:44:06,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:44:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:44:07,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:44:07,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-11 19:44:07,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-11 19:44:07,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149126981] [2024-09-11 19:44:07,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652336571] [2024-09-11 19:44:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652336571] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:07,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:07,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-11 19:44:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98733369] [2024-09-11 19:44:07,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:07,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:44:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:44:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:44:07,697 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-11 19:44:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:08,080 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2024-09-11 19:44:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 19:44:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) Word has length 120 [2024-09-11 19:44:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:08,082 INFO L225 Difference]: With dead ends: 126 [2024-09-11 19:44:08,082 INFO L226 Difference]: Without dead ends: 122 [2024-09-11 19:44:08,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:44:08,083 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:08,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 233 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:44:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-11 19:44:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2024-09-11 19:44:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-11 19:44:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2024-09-11 19:44:08,115 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 120 [2024-09-11 19:44:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:08,116 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2024-09-11 19:44:08,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-11 19:44:08,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2024-09-11 19:44:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-09-11 19:44:08,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:08,117 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:08,130 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 19:44:08,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:44:08,322 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:08,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash -198556648, now seen corresponding path program 2 times [2024-09-11 19:44:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801682152] [2024-09-11 19:44:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:08,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223662379] [2024-09-11 19:44:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:44:08,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:08,358 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) [2024-09-11 19:44:08,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:44:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:44:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:44:08,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-11 19:44:08,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-11 19:44:08,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-11 19:44:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801682152] [2024-09-11 19:44:09,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223662379] [2024-09-11 19:44:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223662379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:09,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-11 19:44:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91129516] [2024-09-11 19:44:09,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:09,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:44:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:44:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:44:09,467 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 11 states have call successors, (44) [2024-09-11 19:44:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:09,972 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2024-09-11 19:44:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:44:09,973 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 11 states have call successors, (44) Word has length 125 [2024-09-11 19:44:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:09,973 INFO L225 Difference]: With dead ends: 135 [2024-09-11 19:44:09,973 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:44:09,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:44:09,975 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:09,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 274 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:44:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:44:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:44:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:44:09,975 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125 [2024-09-11 19:44:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:09,975 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:44:09,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 11 states have call successors, (44) [2024-09-11 19:44:09,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:44:09,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:44:09,978 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:44:09,992 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 19:44:10,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 19:44:10,181 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-09-11 19:44:10,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:44:15,397 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 19:44:15,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 07:44:15 BoogieIcfgContainer [2024-09-11 19:44:15,409 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 19:44:15,410 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 19:44:15,410 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 19:44:15,410 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 19:44:15,410 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:43:56" (3/4) ... [2024-09-11 19:44:15,412 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 19:44:15,414 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-11 19:44:15,418 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-11 19:44:15,418 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-11 19:44:15,418 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 19:44:15,418 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 19:44:15,491 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 19:44:15,492 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 19:44:15,492 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 19:44:15,492 INFO L158 Benchmark]: Toolchain (without parser) took 19202.08ms. Allocated memory was 148.9MB in the beginning and 237.0MB in the end (delta: 88.1MB). Free memory was 116.9MB in the beginning and 76.6MB in the end (delta: 40.3MB). Peak memory consumption was 130.0MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,492 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 121.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:44:15,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.30ms. Allocated memory is still 148.9MB. Free memory was 116.9MB in the beginning and 103.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.15ms. Allocated memory is still 148.9MB. Free memory was 103.7MB in the beginning and 102.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,493 INFO L158 Benchmark]: Boogie Preprocessor took 37.55ms. Allocated memory is still 148.9MB. Free memory was 102.2MB in the beginning and 100.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:44:15,493 INFO L158 Benchmark]: RCFGBuilder took 251.89ms. Allocated memory is still 148.9MB. Free memory was 100.7MB in the beginning and 87.5MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,493 INFO L158 Benchmark]: TraceAbstraction took 18584.54ms. Allocated memory was 148.9MB in the beginning and 237.0MB in the end (delta: 88.1MB). Free memory was 87.0MB in the beginning and 80.8MB in the end (delta: 6.2MB). Peak memory consumption was 105.4MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,494 INFO L158 Benchmark]: Witness Printer took 82.09ms. Allocated memory is still 237.0MB. Free memory was 80.8MB in the beginning and 76.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 19:44:15,495 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 121.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.30ms. Allocated memory is still 148.9MB. Free memory was 116.9MB in the beginning and 103.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.15ms. Allocated memory is still 148.9MB. Free memory was 103.7MB in the beginning and 102.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.55ms. Allocated memory is still 148.9MB. Free memory was 102.2MB in the beginning and 100.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 251.89ms. Allocated memory is still 148.9MB. Free memory was 100.7MB in the beginning and 87.5MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 18584.54ms. Allocated memory was 148.9MB in the beginning and 237.0MB in the end (delta: 88.1MB). Free memory was 87.0MB in the beginning and 80.8MB in the end (delta: 6.2MB). Peak memory consumption was 105.4MB. Max. memory is 16.1GB. * Witness Printer took 82.09ms. Allocated memory is still 237.0MB. Free memory was 80.8MB in the beginning and 76.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.3s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1633 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1302 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1481 IncrementalHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 331 mSDtfsCounter, 1481 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1112 GetRequests, 982 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 1158 NumberOfCodeBlocks, 1128 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1085 ConstructedInterpolants, 0 QuantifiedInterpolants, 5264 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1337 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 5288/5604 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((((__int128) y * z) + ((__int128) 2 * z)) == ((6 + ((__int128) y * 12)) + ((__int128) x * 18))) && ((((__int128) x * z) == (((__int128) x * 12) + (6 * ((__int128) a * x)))) || (n < (a + 1)))) && (((((__int128) y * z) + 6) + ((__int128) z * z)) == ((((__int128) z * 4) + ((__int128) x * 18)) + ((__int128) y * 24)))) && (a <= 50)) && (z == (6 + ((__int128) 6 * n)))) && (0 <= a)) - InvariantResult [Line: 53]: Location Invariant Derived location invariant: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-11 19:44:15,514 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE