./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.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/prodbin-ll_unwindbound50.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 c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e --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 20:20:21,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:20:21,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:20:21,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:20:21,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:20:21,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:20:21,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:20:21,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:20:21,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:20:21,571 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:20:21,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:20:21,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:20:21,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:20:21,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:20:21,573 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:20:21,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:20:21,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:20:21,574 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:20:21,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:20:21,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:20:21,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:20:21,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:20:21,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:20:21,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:20:21,576 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:20:21,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:20:21,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:20:21,577 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:20:21,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:20:21,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:20:21,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:20:21,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:20:21,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:20:21,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:20:21,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:20:21,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:20:21,580 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:20:21,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:20:21,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:20:21,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:20:21,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:20:21,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:20:21,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:20:21,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:20:21,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:20:21,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:20:21,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:20:21,842 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:20:21,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-11 20:20:23,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:20:23,415 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:20:23,415 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-11 20:20:23,422 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1a0a4f73d/b3d0a6dbe8064eb8ba31c373ef0f333a/FLAGac8f1ce7c [2024-09-11 20:20:23,821 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1a0a4f73d/b3d0a6dbe8064eb8ba31c373ef0f333a [2024-09-11 20:20:23,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:20:23,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:20:23,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:20:23,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:20:23,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:20:23,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:20:23" (1/1) ... [2024-09-11 20:20:23,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fc63a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:23, skipping insertion in model container [2024-09-11 20:20:23,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:20:23" (1/1) ... [2024-09-11 20:20:23,857 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:20:24,015 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/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-11 20:20:24,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:20:24,050 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:20:24,063 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/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-11 20:20:24,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:20:24,089 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:20:24,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24 WrapperNode [2024-09-11 20:20:24,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:20:24,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:20:24,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:20:24,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:20:24,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,121 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-09-11 20:20:24,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:20:24,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:20:24,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:20:24,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:20:24,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,133 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,144 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 20:20:24,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,151 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:20:24,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:20:24,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:20:24,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:20:24,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (1/1) ... [2024-09-11 20:20:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:20:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:24,192 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 20:20:24,194 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 20:20:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:20:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:20:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:20:24,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:20:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:20:24,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:20:24,285 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:20:24,287 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:20:24,410 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-11 20:20:24,410 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:20:24,439 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:20:24,439 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:20:24,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:20:24 BoogieIcfgContainer [2024-09-11 20:20:24,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:20:24,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:20:24,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:20:24,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:20:24,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:20:23" (1/3) ... [2024-09-11 20:20:24,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624eae2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:20:24, skipping insertion in model container [2024-09-11 20:20:24,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:20:24" (2/3) ... [2024-09-11 20:20:24,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624eae2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:20:24, skipping insertion in model container [2024-09-11 20:20:24,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:20:24" (3/3) ... [2024-09-11 20:20:24,450 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.c [2024-09-11 20:20:24,462 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:20:24,462 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:20:24,506 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:20:24,512 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;@430fef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:20:24,512 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:20:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:20:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:20:24,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:24,524 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:24,525 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:24,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash -818250469, now seen corresponding path program 1 times [2024-09-11 20:20:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:24,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923822577] [2024-09-11 20:20:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:24,651 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 20:20:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923822577] [2024-09-11 20:20:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923822577] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:20:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:20:24,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:20:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452905394] [2024-09-11 20:20:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:20:24,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:20:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:20:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:20:24,678 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 20:20:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:24,704 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2024-09-11 20:20:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:20:24,706 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 20:20:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:24,711 INFO L225 Difference]: With dead ends: 34 [2024-09-11 20:20:24,711 INFO L226 Difference]: Without dead ends: 16 [2024-09-11 20:20:24,713 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 20:20:24,716 INFO L434 NwaCegarLoop]: 19 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, 19 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 20:20:24,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:20:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-11 20:20:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-11 20:20:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 20:20:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-11 20:20:24,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2024-09-11 20:20:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:24,743 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-11 20:20:24,743 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 20:20:24,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-11 20:20:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 20:20:24,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:24,744 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:24,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:20:24,745 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:24,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1011676302, now seen corresponding path program 1 times [2024-09-11 20:20:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836891668] [2024-09-11 20:20:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:24,887 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 20:20:24,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:24,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836891668] [2024-09-11 20:20:24,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836891668] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:20:24,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:20:24,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 20:20:24,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016098769] [2024-09-11 20:20:24,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:20:24,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 20:20:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 20:20:24,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 20:20:24,895 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 20:20:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:24,980 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-11 20:20:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 20:20:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2024-09-11 20:20:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:24,986 INFO L225 Difference]: With dead ends: 25 [2024-09-11 20:20:24,986 INFO L226 Difference]: Without dead ends: 18 [2024-09-11 20:20:24,986 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 20:20:24,987 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:24,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:20:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-11 20:20:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-11 20:20:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 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 20:20:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-09-11 20:20:24,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2024-09-11 20:20:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:24,999 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-09-11 20:20:24,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 20:20:24,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-09-11 20:20:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 20:20:25,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:25,000 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:25,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:20:25,000 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1009888842, now seen corresponding path program 1 times [2024-09-11 20:20:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168130477] [2024-09-11 20:20:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:25,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799228329] [2024-09-11 20:20:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:25,039 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 20:20:25,041 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 20:20:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:25,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 20:20:25,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:25,302 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 20:20:25,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:20:25,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:25,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168130477] [2024-09-11 20:20:25,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799228329] [2024-09-11 20:20:25,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799228329] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:20:25,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:20:25,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-11 20:20:25,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875032793] [2024-09-11 20:20:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:20:25,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 20:20:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 20:20:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:20:25,306 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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 20:20:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:25,391 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-09-11 20:20:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:20:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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 9 [2024-09-11 20:20:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:25,393 INFO L225 Difference]: With dead ends: 33 [2024-09-11 20:20:25,393 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 20:20:25,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:20:25,394 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:25,396 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:20:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 20:20:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-09-11 20:20:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:20:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-11 20:20:25,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2024-09-11 20:20:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:25,407 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-11 20:20:25,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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 20:20:25,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-11 20:20:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 20:20:25,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:25,408 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:25,429 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:20:25,614 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 20:20:25,615 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:25,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1083966870, now seen corresponding path program 1 times [2024-09-11 20:20:25,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:25,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167777821] [2024-09-11 20:20:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:25,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 20:20:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:25,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167777821] [2024-09-11 20:20:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167777821] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:20:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736749447] [2024-09-11 20:20:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:25,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:25,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:25,819 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 20:20:25,822 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 20:20:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:25,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-11 20:20:25,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:25,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736749447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:20:25,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:20:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-09-11 20:20:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773540359] [2024-09-11 20:20:25,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:25,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:20:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:20:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:20:25,979 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:20:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:26,056 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-09-11 20:20:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:20:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-09-11 20:20:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:26,058 INFO L225 Difference]: With dead ends: 61 [2024-09-11 20:20:26,058 INFO L226 Difference]: Without dead ends: 54 [2024-09-11 20:20:26,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:20:26,060 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:26,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:20:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-11 20:20:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-09-11 20:20:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:20:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-09-11 20:20:26,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 19 [2024-09-11 20:20:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:26,075 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-09-11 20:20:26,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:20:26,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-09-11 20:20:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 20:20:26,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:26,076 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:26,093 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 20:20:26,280 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 20:20:26,281 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1085754330, now seen corresponding path program 1 times [2024-09-11 20:20:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338400109] [2024-09-11 20:20:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:26,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:26,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601886007] [2024-09-11 20:20:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:26,310 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 20:20:26,311 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 20:20:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:26,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 20:20:26,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:26,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:31,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338400109] [2024-09-11 20:20:31,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601886007] [2024-09-11 20:20:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601886007] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:20:31,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:20:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-09-11 20:20:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489407598] [2024-09-11 20:20:31,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:31,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 20:20:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 20:20:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:20:31,555 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:20:34,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 20:20:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:35,103 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-09-11 20:20:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:20:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-11 20:20:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:35,107 INFO L225 Difference]: With dead ends: 83 [2024-09-11 20:20:35,107 INFO L226 Difference]: Without dead ends: 81 [2024-09-11 20:20:35,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:20:35,110 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:35,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 127 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-11 20:20:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-11 20:20:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-11 20:20:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 20:20:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2024-09-11 20:20:35,132 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 19 [2024-09-11 20:20:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:35,133 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2024-09-11 20:20:35,133 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:20:35,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2024-09-11 20:20:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 20:20:35,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:35,134 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:35,153 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 20:20:35,334 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 20:20:35,335 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:35,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 276407704, now seen corresponding path program 1 times [2024-09-11 20:20:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:35,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227117370] [2024-09-11 20:20:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:35,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236954018] [2024-09-11 20:20:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:35,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:35,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:35,354 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 20:20:35,355 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 20:20:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:35,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-11 20:20:35,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:35,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227117370] [2024-09-11 20:20:38,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236954018] [2024-09-11 20:20:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236954018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:20:38,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:20:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-11 20:20:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304667694] [2024-09-11 20:20:38,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:38,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 20:20:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:38,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 20:20:38,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:20:38,696 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 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 20:20:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:39,523 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2024-09-11 20:20:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:20:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 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 19 [2024-09-11 20:20:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:39,528 INFO L225 Difference]: With dead ends: 90 [2024-09-11 20:20:39,528 INFO L226 Difference]: Without dead ends: 81 [2024-09-11 20:20:39,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-09-11 20:20:39,530 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:39,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 20:20:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-11 20:20:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-11 20:20:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 67 states have internal predecessors, (75), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 20:20:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2024-09-11 20:20:39,562 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 19 [2024-09-11 20:20:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:39,563 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2024-09-11 20:20:39,563 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 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 20:20:39,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2024-09-11 20:20:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 20:20:39,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:39,564 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:39,583 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 20:20:39,768 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 20:20:39,769 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:39,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2037077519, now seen corresponding path program 1 times [2024-09-11 20:20:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918585751] [2024-09-11 20:20:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:39,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749662404] [2024-09-11 20:20:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:39,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:39,804 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 20:20:39,807 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 20:20:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:39,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 20:20:39,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:20:39,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:20:39,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918585751] [2024-09-11 20:20:39,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749662404] [2024-09-11 20:20:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749662404] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:20:39,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:20:39,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-11 20:20:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818013520] [2024-09-11 20:20:39,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:39,995 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:20:39,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:20:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:20:39,998 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:20:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:40,082 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2024-09-11 20:20:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:20:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-11 20:20:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:40,084 INFO L225 Difference]: With dead ends: 93 [2024-09-11 20:20:40,084 INFO L226 Difference]: Without dead ends: 78 [2024-09-11 20:20:40,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:20:40,085 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:40,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:20:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-11 20:20:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-09-11 20:20:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 64 states have internal predecessors, (70), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 20:20:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-09-11 20:20:40,111 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 25 [2024-09-11 20:20:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:40,111 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-09-11 20:20:40,111 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:20:40,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-09-11 20:20:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 20:20:40,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:40,113 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-11 20:20:40,131 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 20:20:40,313 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 20:20:40,314 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:40,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1530857210, now seen corresponding path program 2 times [2024-09-11 20:20:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:40,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763055739] [2024-09-11 20:20:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868693123] [2024-09-11 20:20:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:20:40,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:40,346 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 20:20:40,347 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 20:20:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:20:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:20:40,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 20:20:40,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:20:41,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:20:44,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:44,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763055739] [2024-09-11 20:20:44,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868693123] [2024-09-11 20:20:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868693123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:20:44,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:20:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2024-09-11 20:20:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440748293] [2024-09-11 20:20:44,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:44,168 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:20:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:20:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:20:44,169 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:20:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:45,766 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2024-09-11 20:20:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:20:45,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-09-11 20:20:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:45,768 INFO L225 Difference]: With dead ends: 112 [2024-09-11 20:20:45,768 INFO L226 Difference]: Without dead ends: 110 [2024-09-11 20:20:45,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:20:45,769 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:45,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 120 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:20:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-11 20:20:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2024-09-11 20:20:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 87 states have (on average 1.160919540229885) internal successors, (101), 90 states have internal predecessors, (101), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 20:20:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2024-09-11 20:20:45,809 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 29 [2024-09-11 20:20:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:45,810 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2024-09-11 20:20:45,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:20:45,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2024-09-11 20:20:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 20:20:45,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:45,812 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:45,827 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 20:20:46,016 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 20:20:46,017 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:46,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2036959006, now seen corresponding path program 1 times [2024-09-11 20:20:46,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347063273] [2024-09-11 20:20:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:46,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:46,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532434523] [2024-09-11 20:20:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:46,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:46,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:46,057 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 20:20:46,059 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 20:20:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:46,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 20:20:46,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:20:46,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347063273] [2024-09-11 20:20:47,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:20:47,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532434523] [2024-09-11 20:20:47,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532434523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:20:47,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:20:47,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-11 20:20:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132704886] [2024-09-11 20:20:47,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:47,238 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:20:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:20:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:20:47,239 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:20:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:47,739 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-09-11 20:20:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:20:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2024-09-11 20:20:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:47,741 INFO L225 Difference]: With dead ends: 118 [2024-09-11 20:20:47,741 INFO L226 Difference]: Without dead ends: 116 [2024-09-11 20:20:47,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:20:47,742 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:47,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 205 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 20:20:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-11 20:20:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-09-11 20:20:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 94 states have internal predecessors, (104), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 20:20:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2024-09-11 20:20:47,782 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 39 [2024-09-11 20:20:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:47,783 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2024-09-11 20:20:47,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:20:47,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2024-09-11 20:20:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 20:20:47,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:47,785 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:20:47,800 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:20:47,989 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 20:20:47,990 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:47,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1536935426, now seen corresponding path program 2 times [2024-09-11 20:20:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284499860] [2024-09-11 20:20:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:48,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 20:20:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:48,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-11 20:20:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:48,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:20:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:48,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-11 20:20:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:20:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:20:48,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:20:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284499860] [2024-09-11 20:20:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284499860] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:20:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858880831] [2024-09-11 20:20:48,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:20:48,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:48,216 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 20:20:48,218 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 20:20:48,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:20:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:20:48,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 20:20:48,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:20:48,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:20:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:20:48,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858880831] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:20:48,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:20:48,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-09-11 20:20:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866152687] [2024-09-11 20:20:48,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:20:48,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:20:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:20:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:20:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:20:48,426 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:20:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:20:48,610 INFO L93 Difference]: Finished difference Result 293 states and 338 transitions. [2024-09-11 20:20:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:20:48,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 49 [2024-09-11 20:20:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:20:48,613 INFO L225 Difference]: With dead ends: 293 [2024-09-11 20:20:48,613 INFO L226 Difference]: Without dead ends: 286 [2024-09-11 20:20:48,614 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:20:48,616 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:20:48,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 146 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:20:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-09-11 20:20:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2024-09-11 20:20:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 219 states have (on average 1.1369863013698631) internal successors, (249), 228 states have internal predecessors, (249), 30 states have call successors, (30), 26 states have call predecessors, (30), 26 states have return successors, (29), 21 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-11 20:20:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2024-09-11 20:20:48,695 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 49 [2024-09-11 20:20:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:20:48,696 INFO L474 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2024-09-11 20:20:48,696 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:20:48,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2024-09-11 20:20:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 20:20:48,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:20:48,698 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2024-09-11 20:20:48,715 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:20:48,902 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 20:20:48,903 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:20:48,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:20:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1264768446, now seen corresponding path program 2 times [2024-09-11 20:20:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:20:48,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877722194] [2024-09-11 20:20:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:20:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:20:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:20:48,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595512129] [2024-09-11 20:20:48,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:20:48,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:20:48,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:20:48,933 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 20:20:48,938 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 20:20:48,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:20:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:20:48,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 20:20:48,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:20:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:20:49,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:21:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 37 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:21:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:21:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877722194] [2024-09-11 20:21:08,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:21:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595512129] [2024-09-11 20:21:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595512129] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:21:08,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:21:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2024-09-11 20:21:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772537118] [2024-09-11 20:21:08,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:21:08,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:21:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:21:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:21:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:21:08,666 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:21:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:21:34,496 INFO L93 Difference]: Finished difference Result 397 states and 451 transitions. [2024-09-11 20:21:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 20:21:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2024-09-11 20:21:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:21:34,501 INFO L225 Difference]: With dead ends: 397 [2024-09-11 20:21:34,504 INFO L226 Difference]: Without dead ends: 395 [2024-09-11 20:21:34,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 20:21:34,505 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:21:34,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 286 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-09-11 20:21:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-11 20:21:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2024-09-11 20:21:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 312 states have (on average 1.1378205128205128) internal successors, (355), 322 states have internal predecessors, (355), 43 states have call successors, (43), 35 states have call predecessors, (43), 35 states have return successors, (42), 33 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-11 20:21:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 440 transitions. [2024-09-11 20:21:34,642 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 440 transitions. Word has length 49 [2024-09-11 20:21:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:21:34,642 INFO L474 AbstractCegarLoop]: Abstraction has 391 states and 440 transitions. [2024-09-11 20:21:34,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:21:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:21:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 440 transitions. [2024-09-11 20:21:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 20:21:34,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:21:34,649 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-09-11 20:21:34,667 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 20:21:34,850 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 20:21:34,851 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:21:34,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:21:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1774241536, now seen corresponding path program 3 times [2024-09-11 20:21:34,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:21:34,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896195861] [2024-09-11 20:21:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:21:34,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:21:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:21:34,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463709074] [2024-09-11 20:21:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:21:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:21:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:21:34,885 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 20:21:34,886 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 20:21:34,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 20:21:34,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:21:34,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 20:21:34,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:21:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:21:35,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:21:35,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:21:35,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896195861] [2024-09-11 20:21:35,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:21:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463709074] [2024-09-11 20:21:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463709074] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:21:35,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:21:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-11 20:21:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452079305] [2024-09-11 20:21:35,824 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:21:35,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:21:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:21:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:21:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:21:35,826 INFO L87 Difference]: Start difference. First operand 391 states and 440 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:21:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:21:36,771 INFO L93 Difference]: Finished difference Result 393 states and 441 transitions. [2024-09-11 20:21:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:21:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2024-09-11 20:21:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:21:36,775 INFO L225 Difference]: With dead ends: 393 [2024-09-11 20:21:36,776 INFO L226 Difference]: Without dead ends: 391 [2024-09-11 20:21:36,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:21:36,778 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:21:36,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:21:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-09-11 20:21:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2024-09-11 20:21:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 312 states have (on average 1.1346153846153846) internal successors, (354), 322 states have internal predecessors, (354), 43 states have call successors, (43), 35 states have call predecessors, (43), 35 states have return successors, (42), 33 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-11 20:21:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 439 transitions. [2024-09-11 20:21:36,894 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 439 transitions. Word has length 49 [2024-09-11 20:21:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:21:36,894 INFO L474 AbstractCegarLoop]: Abstraction has 391 states and 439 transitions. [2024-09-11 20:21:36,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-11 20:21:36,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:21:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 439 transitions. [2024-09-11 20:21:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-11 20:21:36,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:21:36,896 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-09-11 20:21:36,912 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:21:37,101 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 20:21:37,102 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:21:37,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:21:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash -28215198, now seen corresponding path program 4 times [2024-09-11 20:21:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:21:37,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927876661] [2024-09-11 20:21:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:21:37,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:21:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:21:37,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192742877] [2024-09-11 20:21:37,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:21:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:21:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:21:37,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:21:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:21:37,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:21:37,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:21:37,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-11 20:21:37,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:21:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 89 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:21:46,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:22:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:22:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927876661] [2024-09-11 20:22:12,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:22:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192742877] [2024-09-11 20:22:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192742877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:22:12,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:22:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 20:22:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039015363] [2024-09-11 20:22:12,835 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:22:12,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:22:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:22:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:22:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:22:12,836 INFO L87 Difference]: Start difference. First operand 391 states and 439 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:22:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:22:16,999 INFO L93 Difference]: Finished difference Result 670 states and 782 transitions. [2024-09-11 20:22:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:22:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 59 [2024-09-11 20:22:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:22:17,003 INFO L225 Difference]: With dead ends: 670 [2024-09-11 20:22:17,003 INFO L226 Difference]: Without dead ends: 668 [2024-09-11 20:22:17,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:22:17,004 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:22:17,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 266 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-11 20:22:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2024-09-11 20:22:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 201. [2024-09-11 20:22:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 161 states have (on average 1.15527950310559) internal successors, (186), 162 states have internal predecessors, (186), 20 states have call successors, (20), 19 states have call predecessors, (20), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 20:22:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2024-09-11 20:22:17,117 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 59 [2024-09-11 20:22:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:22:17,118 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2024-09-11 20:22:17,118 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:22:17,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:22:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2024-09-11 20:22:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:22:17,119 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:22:17,119 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-09-11 20:22:17,136 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:22:17,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:22:17,320 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:22:17,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:22:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1497863042, now seen corresponding path program 3 times [2024-09-11 20:22:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:22:17,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838669040] [2024-09-11 20:22:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:22:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:22:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:22:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116116949] [2024-09-11 20:22:17,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:22:17,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:22:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:22:17,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:22:17,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:22:17,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-11 20:22:17,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:22:17,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 20:22:17,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:22:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 20:22:19,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:24:10,028 WARN L293 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 366 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:24:32,975 WARN L293 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 366 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)