./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/half_2.i -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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:36:03,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:36:03,684 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:36:03,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:36:03,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:36:03,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:36:03,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:36:03,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:36:03,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:36:03,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:36:03,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:36:03,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:36:03,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:36:03,717 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:36:03,717 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:36:03,718 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:36:03,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:36:03,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:36:03,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:36:03,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:36:03,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:36:03,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:36:03,721 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:36:03,721 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:36:03,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:36:03,722 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:36:03,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:36:03,722 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:36:03,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:36:03,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:36:03,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:36:03,723 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:36:03,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:36:03,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:36:03,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:36:03,726 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:36:03,726 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:36:03,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:36:03,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:36:03,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:36:03,728 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:36:03,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:36:03,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:36:03,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:36:03,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:36:03,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:36:03,970 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:36:03,970 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:36:03,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/half_2.i [2024-09-18 15:36:05,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:36:05,444 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:36:05,444 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i [2024-09-18 15:36:05,452 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/814edd988/eee7a508d5334a0a981c61f78ecbc65c/FLAGed3f28c1d [2024-09-18 15:36:05,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/814edd988/eee7a508d5334a0a981c61f78ecbc65c [2024-09-18 15:36:05,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:36:05,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:36:05,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:36:05,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:36:05,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:36:05,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cb3460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05, skipping insertion in model container [2024-09-18 15:36:05,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,493 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:36:05,618 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2024-09-18 15:36:05,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:36:05,643 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:36:05,653 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2024-09-18 15:36:05,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:36:05,670 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:36:05,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05 WrapperNode [2024-09-18 15:36:05,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:36:05,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:36:05,673 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:36:05,673 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:36:05,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,688 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:36:05,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:36:05,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:36:05,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:36:05,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:36:05,696 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,697 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,708 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 15:36:05,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:36:05,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:36:05,717 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:36:05,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:36:05,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (1/1) ... [2024-09-18 15:36:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:36:05,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:05,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 15:36:05,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 15:36:05,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:36:05,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:36:05,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:36:05,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:36:05,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:36:05,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:36:05,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:36:05,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:36:05,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:36:05,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:36:05,882 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:36:05,884 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:36:05,972 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-18 15:36:05,972 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:36:05,994 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:36:05,994 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:36:05,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:36:05 BoogieIcfgContainer [2024-09-18 15:36:05,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:36:05,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:36:05,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:36:06,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:36:06,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:36:05" (1/3) ... [2024-09-18 15:36:06,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bcc9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:36:06, skipping insertion in model container [2024-09-18 15:36:06,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:05" (2/3) ... [2024-09-18 15:36:06,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bcc9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:36:06, skipping insertion in model container [2024-09-18 15:36:06,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:36:05" (3/3) ... [2024-09-18 15:36:06,004 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2024-09-18 15:36:06,018 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:36:06,019 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:36:06,072 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:36:06,078 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;@2fb0fed5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:36:06,078 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:36:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:36:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:36:06,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:06,087 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:06,088 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:06,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-18 15:36:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391343342] [2024-09-18 15:36:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:06,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:06,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:06,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391343342] [2024-09-18 15:36:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391343342] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:06,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:06,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120235049] [2024-09-18 15:36:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:06,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:06,536 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:06,640 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-18 15:36:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-18 15:36:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:06,646 INFO L225 Difference]: With dead ends: 46 [2024-09-18 15:36:06,646 INFO L226 Difference]: Without dead ends: 26 [2024-09-18 15:36:06,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:36:06,653 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:06,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-18 15:36:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-18 15:36:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:36:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-18 15:36:06,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-18 15:36:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:06,703 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-18 15:36:06,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-18 15:36:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:36:06,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:06,704 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:06,704 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:36:06,704 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:06,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-18 15:36:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562411677] [2024-09-18 15:36:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:06,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562411677] [2024-09-18 15:36:06,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562411677] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:06,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429053477] [2024-09-18 15:36:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:06,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:06,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:06,888 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:36:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:06,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:36:06,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:07,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:07,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429053477] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:07,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:07,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-18 15:36:07,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302350569] [2024-09-18 15:36:07,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:07,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:36:07,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:07,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:36:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:36:07,185 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:07,365 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-09-18 15:36:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:36:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-18 15:36:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:07,367 INFO L225 Difference]: With dead ends: 43 [2024-09-18 15:36:07,368 INFO L226 Difference]: Without dead ends: 41 [2024-09-18 15:36:07,368 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:36:07,369 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:07,369 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-18 15:36:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-18 15:36:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:36:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-18 15:36:07,378 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2024-09-18 15:36:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:07,378 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-18 15:36:07,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:07,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-18 15:36:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:36:07,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:07,380 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:07,393 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:07,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:07,585 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:07,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash 956344902, now seen corresponding path program 2 times [2024-09-18 15:36:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:07,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515490745] [2024-09-18 15:36:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:07,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515490745] [2024-09-18 15:36:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515490745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265317852] [2024-09-18 15:36:07,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:36:07,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:07,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:07,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:36:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:36:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:07,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:36:07,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:07,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265317852] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:07,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-18 15:36:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298724420] [2024-09-18 15:36:07,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:07,925 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:36:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:36:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:36:07,927 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:08,052 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-09-18 15:36:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:36:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-18 15:36:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:08,055 INFO L225 Difference]: With dead ends: 56 [2024-09-18 15:36:08,055 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 15:36:08,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:36:08,057 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:08,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 173 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 15:36:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2024-09-18 15:36:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:36:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-18 15:36:08,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2024-09-18 15:36:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:08,071 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-18 15:36:08,071 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:36:08,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-18 15:36:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:36:08,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:08,073 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:08,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:08,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:08,278 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:08,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1089087464, now seen corresponding path program 1 times [2024-09-18 15:36:08,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:08,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480841360] [2024-09-18 15:36:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-18 15:36:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:08,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:08,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480841360] [2024-09-18 15:36:08,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480841360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191235387] [2024-09-18 15:36:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:08,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:08,374 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:36:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:36:08,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:08,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:36:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191235387] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:08,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:36:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-18 15:36:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166706895] [2024-09-18 15:36:08,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:08,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:36:08,434 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:36:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:08,457 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-09-18 15:36:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:36:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-18 15:36:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:08,458 INFO L225 Difference]: With dead ends: 48 [2024-09-18 15:36:08,458 INFO L226 Difference]: Without dead ends: 36 [2024-09-18 15:36:08,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:36:08,459 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:08,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:36:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-18 15:36:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-18 15:36:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:36:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-09-18 15:36:08,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-09-18 15:36:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:08,466 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-09-18 15:36:08,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:36:08,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-09-18 15:36:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:36:08,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:08,467 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:08,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:36:08,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:08,672 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -177252568, now seen corresponding path program 1 times [2024-09-18 15:36:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440579464] [2024-09-18 15:36:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 15:36:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:08,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:08,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440579464] [2024-09-18 15:36:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440579464] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:08,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384285603] [2024-09-18 15:36:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:08,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:08,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:08,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:08,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:36:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:08,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:36:08,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:08,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384285603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:09,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-09-18 15:36:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220531157] [2024-09-18 15:36:09,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:09,160 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:36:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:36:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:36:09,161 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:36:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:09,381 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-18 15:36:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:36:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-18 15:36:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:09,382 INFO L225 Difference]: With dead ends: 66 [2024-09-18 15:36:09,382 INFO L226 Difference]: Without dead ends: 46 [2024-09-18 15:36:09,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:36:09,383 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:09,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-18 15:36:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2024-09-18 15:36:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 15:36:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-09-18 15:36:09,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2024-09-18 15:36:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:09,390 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-09-18 15:36:09,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:36:09,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-09-18 15:36:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:36:09,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:09,391 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:09,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:36:09,595 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:09,596 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:09,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-18 15:36:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:09,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680392681] [2024-09-18 15:36:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:09,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:09,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:09,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:36:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680392681] [2024-09-18 15:36:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680392681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315969055] [2024-09-18 15:36:09,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:36:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:09,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:09,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:36:09,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:36:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:09,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:36:09,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:36:09,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:36:09,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315969055] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:09,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:09,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-09-18 15:36:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799818499] [2024-09-18 15:36:09,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:09,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:36:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:36:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:36:09,868 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:36:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:09,956 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-18 15:36:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:36:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2024-09-18 15:36:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:09,957 INFO L225 Difference]: With dead ends: 60 [2024-09-18 15:36:09,957 INFO L226 Difference]: Without dead ends: 41 [2024-09-18 15:36:09,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:36:09,958 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:09,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:36:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-18 15:36:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-18 15:36:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 15:36:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-18 15:36:09,963 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2024-09-18 15:36:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:09,964 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-18 15:36:09,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:36:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-18 15:36:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:36:09,965 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:09,965 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:09,977 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:36:10,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:36:10,168 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1852463814, now seen corresponding path program 3 times [2024-09-18 15:36:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650590774] [2024-09-18 15:36:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:10,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:10,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:36:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:10,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:36:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:10,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:10,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650590774] [2024-09-18 15:36:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650590774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:10,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250133821] [2024-09-18 15:36:10,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:36:10,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:10,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:10,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:36:10,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:36:10,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:10,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 15:36:10,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:10,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:10,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250133821] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:10,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:10,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-09-18 15:36:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216674384] [2024-09-18 15:36:10,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:10,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-18 15:36:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-18 15:36:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-09-18 15:36:10,985 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:36:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:11,208 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2024-09-18 15:36:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:36:11,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 30 [2024-09-18 15:36:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:11,209 INFO L225 Difference]: With dead ends: 68 [2024-09-18 15:36:11,209 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:36:11,210 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:36:11,211 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:11,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 174 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:36:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:36:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 15:36:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-18 15:36:11,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2024-09-18 15:36:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:11,217 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-18 15:36:11,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:36:11,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-18 15:36:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:36:11,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:11,217 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:11,230 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:11,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:11,419 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1152152512, now seen corresponding path program 4 times [2024-09-18 15:36:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258851225] [2024-09-18 15:36:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-18 15:36:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258851225] [2024-09-18 15:36:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258851225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650211804] [2024-09-18 15:36:11,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:36:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:11,536 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:11,537 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:36:11,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:36:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:11,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:36:11,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:36:11,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:36:12,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650211804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:12,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:12,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 24 [2024-09-18 15:36:12,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440842190] [2024-09-18 15:36:12,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:12,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:36:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:12,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:36:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:36:12,129 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:36:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:12,245 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-18 15:36:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:36:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-09-18 15:36:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:12,246 INFO L225 Difference]: With dead ends: 54 [2024-09-18 15:36:12,246 INFO L226 Difference]: Without dead ends: 52 [2024-09-18 15:36:12,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:36:12,247 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:12,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-18 15:36:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-18 15:36:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:36:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-09-18 15:36:12,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2024-09-18 15:36:12,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:12,260 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-09-18 15:36:12,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:36:12,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-09-18 15:36:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 15:36:12,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:12,261 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:12,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:36:12,461 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:12,462 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:12,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -164723864, now seen corresponding path program 5 times [2024-09-18 15:36:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212121742] [2024-09-18 15:36:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-18 15:36:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:36:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:13,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212121742] [2024-09-18 15:36:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212121742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465293968] [2024-09-18 15:36:13,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:36:13,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:13,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:36:13,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-18 15:36:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:13,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 15:36:13,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:13,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465293968] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:13,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-09-18 15:36:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222756132] [2024-09-18 15:36:13,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:13,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-18 15:36:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-18 15:36:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-09-18 15:36:13,612 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:36:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:14,083 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-18 15:36:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:36:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2024-09-18 15:36:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:14,084 INFO L225 Difference]: With dead ends: 97 [2024-09-18 15:36:14,084 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 15:36:14,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2024-09-18 15:36:14,086 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:14,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 174 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:36:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 15:36:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-18 15:36:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:36:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-18 15:36:14,097 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 38 [2024-09-18 15:36:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:14,097 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-18 15:36:14,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:36:14,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-18 15:36:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:36:14,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:14,098 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:14,110 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:14,302 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:14,303 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:14,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-18 15:36:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:14,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181141115] [2024-09-18 15:36:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:36:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:36:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181141115] [2024-09-18 15:36:14,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181141115] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872037697] [2024-09-18 15:36:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:36:14,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:14,526 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:14,528 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:36:14,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-18 15:36:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:14,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:36:14,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:14,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872037697] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:14,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2024-09-18 15:36:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399933594] [2024-09-18 15:36:14,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:14,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-18 15:36:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-18 15:36:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 15:36:14,967 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:36:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:15,231 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2024-09-18 15:36:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:36:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2024-09-18 15:36:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:15,233 INFO L225 Difference]: With dead ends: 120 [2024-09-18 15:36:15,233 INFO L226 Difference]: Without dead ends: 118 [2024-09-18 15:36:15,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=503, Invalid=1947, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:36:15,234 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:15,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 243 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:36:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-18 15:36:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-09-18 15:36:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 87 states have internal predecessors, (88), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-18 15:36:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-18 15:36:15,249 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 43 [2024-09-18 15:36:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:15,249 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-18 15:36:15,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:36:15,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-18 15:36:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 15:36:15,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:15,251 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:15,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:36:15,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 15:36:15,456 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:15,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -560948602, now seen corresponding path program 7 times [2024-09-18 15:36:15,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:15,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921952410] [2024-09-18 15:36:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-18 15:36:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:36:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:36:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:36:15,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:15,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921952410] [2024-09-18 15:36:15,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921952410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:15,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467410889] [2024-09-18 15:36:15,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:36:15,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:15,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:15,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:36:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:36:15,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:36:16,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:36:16,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467410889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:16,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:16,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-09-18 15:36:16,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535711094] [2024-09-18 15:36:16,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:16,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-18 15:36:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-18 15:36:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 15:36:16,545 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 15:36:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:17,145 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2024-09-18 15:36:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:36:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 46 [2024-09-18 15:36:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:17,147 INFO L225 Difference]: With dead ends: 176 [2024-09-18 15:36:17,147 INFO L226 Difference]: Without dead ends: 139 [2024-09-18 15:36:17,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:36:17,148 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:17,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 210 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:36:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-18 15:36:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-18 15:36:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 100 states have internal predecessors, (102), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-18 15:36:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2024-09-18 15:36:17,165 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 46 [2024-09-18 15:36:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:17,165 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2024-09-18 15:36:17,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 15:36:17,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2024-09-18 15:36:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 15:36:17,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:17,167 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:17,178 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:17,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 15:36:17,370 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:17,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1996799912, now seen corresponding path program 8 times [2024-09-18 15:36:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50719838] [2024-09-18 15:36:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:36:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:36:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:36:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:36:17,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50719838] [2024-09-18 15:36:17,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50719838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27583179] [2024-09-18 15:36:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:36:17,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:17,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:17,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:36:17,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:36:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:17,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:36:17,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:36:18,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:36:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27583179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:18,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:18,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2024-09-18 15:36:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782011713] [2024-09-18 15:36:18,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:18,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-18 15:36:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-18 15:36:18,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-09-18 15:36:18,900 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:36:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:19,734 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-09-18 15:36:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-18 15:36:19,735 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 54 [2024-09-18 15:36:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:19,736 INFO L225 Difference]: With dead ends: 197 [2024-09-18 15:36:19,736 INFO L226 Difference]: Without dead ends: 153 [2024-09-18 15:36:19,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2024-09-18 15:36:19,738 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:19,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:36:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-18 15:36:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2024-09-18 15:36:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 111 states have internal predecessors, (114), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (33), 28 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-18 15:36:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2024-09-18 15:36:19,761 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 54 [2024-09-18 15:36:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:19,761 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2024-09-18 15:36:19,762 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:36:19,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2024-09-18 15:36:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 15:36:19,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:19,763 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:19,776 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 15:36:19,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:19,967 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:19,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1940245062, now seen corresponding path program 9 times [2024-09-18 15:36:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:19,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096999638] [2024-09-18 15:36:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:36:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:36:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:36:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:36:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:36:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:20,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096999638] [2024-09-18 15:36:20,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096999638] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115169848] [2024-09-18 15:36:20,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:36:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:20,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:20,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:36:20,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-18 15:36:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:20,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:36:20,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:36:20,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:36:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115169848] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:21,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 46 [2024-09-18 15:36:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031322585] [2024-09-18 15:36:21,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:21,599 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-18 15:36:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-18 15:36:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2024-09-18 15:36:21,600 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 15:36:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:22,682 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2024-09-18 15:36:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:36:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 62 [2024-09-18 15:36:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:22,684 INFO L225 Difference]: With dead ends: 215 [2024-09-18 15:36:22,684 INFO L226 Difference]: Without dead ends: 164 [2024-09-18 15:36:22,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=3437, Unknown=0, NotChecked=0, Total=4032 [2024-09-18 15:36:22,686 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:22,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:36:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-18 15:36:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2024-09-18 15:36:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 120 states have internal predecessors, (124), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-18 15:36:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2024-09-18 15:36:22,709 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 62 [2024-09-18 15:36:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:22,709 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2024-09-18 15:36:22,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 15:36:22,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2024-09-18 15:36:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-18 15:36:22,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:22,711 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:22,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:22,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:36:22,912 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:22,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash 391515112, now seen corresponding path program 10 times [2024-09-18 15:36:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:22,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612416481] [2024-09-18 15:36:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:36:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:36:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:36:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 15:36:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:36:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:36:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 15:36:23,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612416481] [2024-09-18 15:36:23,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612416481] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:23,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880844615] [2024-09-18 15:36:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:36:23,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:23,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:23,460 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:23,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:36:23,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:36:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:23,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:36:23,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 15:36:23,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 15:36:24,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880844615] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:24,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:24,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 51 [2024-09-18 15:36:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973766690] [2024-09-18 15:36:24,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:24,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-18 15:36:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-18 15:36:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2024-09-18 15:36:24,638 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-18 15:36:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:26,092 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2024-09-18 15:36:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-18 15:36:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 70 [2024-09-18 15:36:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:26,094 INFO L225 Difference]: With dead ends: 230 [2024-09-18 15:36:26,094 INFO L226 Difference]: Without dead ends: 172 [2024-09-18 15:36:26,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2024-09-18 15:36:26,096 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:26,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 336 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:36:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-18 15:36:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-18 15:36:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 127 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 10 states have return successors, (37), 31 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-18 15:36:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-18 15:36:26,129 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 70 [2024-09-18 15:36:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:26,129 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-18 15:36:26,129 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-18 15:36:26,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-18 15:36:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-18 15:36:26,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:26,131 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:26,143 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-18 15:36:26,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:36:26,331 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:26,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash 96856582, now seen corresponding path program 11 times [2024-09-18 15:36:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:26,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572382114] [2024-09-18 15:36:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:36:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:36:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:36:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:36:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-18 15:36:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-18 15:36:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:36:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:36:26,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:26,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572382114] [2024-09-18 15:36:26,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572382114] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:26,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399727110] [2024-09-18 15:36:26,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:36:26,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:26,969 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:36:27,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-18 15:36:27,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:27,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 15:36:27,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:36:27,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:36:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399727110] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:28,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2024-09-18 15:36:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355035164] [2024-09-18 15:36:28,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:28,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-18 15:36:28,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-18 15:36:28,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2024-09-18 15:36:28,655 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 15:36:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:30,312 INFO L93 Difference]: Finished difference Result 262 states and 310 transitions. [2024-09-18 15:36:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:36:30,313 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 78 [2024-09-18 15:36:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:30,314 INFO L225 Difference]: With dead ends: 262 [2024-09-18 15:36:30,314 INFO L226 Difference]: Without dead ends: 201 [2024-09-18 15:36:30,316 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=891, Invalid=5115, Unknown=0, NotChecked=0, Total=6006 [2024-09-18 15:36:30,316 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:30,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:36:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-18 15:36:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2024-09-18 15:36:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 148 states have internal predecessors, (153), 46 states have call successors, (46), 12 states have call predecessors, (46), 11 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-18 15:36:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-09-18 15:36:30,354 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 78 [2024-09-18 15:36:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:30,354 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-09-18 15:36:30,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 15:36:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-09-18 15:36:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-18 15:36:30,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:30,356 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:30,368 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 15:36:30,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:36:30,557 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:30,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1215928280, now seen corresponding path program 12 times [2024-09-18 15:36:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524233536] [2024-09-18 15:36:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:36:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:36:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:36:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:36:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:36:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:36:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-18 15:36:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:36:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 15:36:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-18 15:36:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524233536] [2024-09-18 15:36:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524233536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731165650] [2024-09-18 15:36:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:36:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:31,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:31,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:31,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:36:31,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-18 15:36:31,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:31,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-18 15:36:31,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:36:32,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:36:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731165650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:33,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 28] total 75 [2024-09-18 15:36:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447889486] [2024-09-18 15:36:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:33,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-18 15:36:33,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-18 15:36:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5023, Unknown=0, NotChecked=0, Total=5550 [2024-09-18 15:36:33,724 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-18 15:36:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:36,095 INFO L93 Difference]: Finished difference Result 256 states and 299 transitions. [2024-09-18 15:36:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-18 15:36:36,096 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 86 [2024-09-18 15:36:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:36,097 INFO L225 Difference]: With dead ends: 256 [2024-09-18 15:36:36,097 INFO L226 Difference]: Without dead ends: 184 [2024-09-18 15:36:36,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1096, Invalid=10034, Unknown=0, NotChecked=0, Total=11130 [2024-09-18 15:36:36,100 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:36,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:36:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-18 15:36:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-18 15:36:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 137 states have internal predecessors, (141), 42 states have call successors, (42), 11 states have call predecessors, (42), 10 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-18 15:36:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2024-09-18 15:36:36,126 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 86 [2024-09-18 15:36:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:36,126 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2024-09-18 15:36:36,127 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-18 15:36:36,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2024-09-18 15:36:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-18 15:36:36,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:36,128 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:36,140 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-18 15:36:36,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:36:36,332 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:36,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1932610338, now seen corresponding path program 13 times [2024-09-18 15:36:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:36,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721888305] [2024-09-18 15:36:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:36:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:36:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:36:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-18 15:36:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-18 15:36:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:36:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:36:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:36:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 63 proven. 147 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-18 15:36:36,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:36,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721888305] [2024-09-18 15:36:36,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721888305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:36,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584621196] [2024-09-18 15:36:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:36:36,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:36,666 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:36,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:36:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:36,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:36:36,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-18 15:36:36,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-18 15:36:37,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584621196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:37,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:37,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-18 15:36:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477989430] [2024-09-18 15:36:37,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:37,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-18 15:36:37,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-18 15:36:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2024-09-18 15:36:37,296 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:36:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:37,579 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2024-09-18 15:36:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:36:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-18 15:36:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:37,583 INFO L225 Difference]: With dead ends: 197 [2024-09-18 15:36:37,583 INFO L226 Difference]: Without dead ends: 195 [2024-09-18 15:36:37,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2024-09-18 15:36:37,584 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:37,585 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 205 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-18 15:36:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2024-09-18 15:36:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 144 states have internal predecessors, (148), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-18 15:36:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2024-09-18 15:36:37,623 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 87 [2024-09-18 15:36:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:37,623 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2024-09-18 15:36:37,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:36:37,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2024-09-18 15:36:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-18 15:36:37,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:37,625 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:37,638 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:36:37,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:37,828 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:37,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash 202176966, now seen corresponding path program 14 times [2024-09-18 15:36:37,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:37,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540236268] [2024-09-18 15:36:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:36:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:36:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:36:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-18 15:36:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-18 15:36:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:36:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:36:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:36:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-18 15:36:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:36:38,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540236268] [2024-09-18 15:36:38,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540236268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830716130] [2024-09-18 15:36:38,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:36:38,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:38,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:38,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:38,759 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:36:38,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:36:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:38,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-18 15:36:38,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:36:39,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-18 15:36:41,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830716130] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:41,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:41,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2024-09-18 15:36:41,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659554363] [2024-09-18 15:36:41,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:41,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-18 15:36:41,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-18 15:36:41,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=5083, Unknown=0, NotChecked=0, Total=5852 [2024-09-18 15:36:41,122 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-18 15:36:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:43,476 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-09-18 15:36:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-18 15:36:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 94 [2024-09-18 15:36:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:43,479 INFO L225 Difference]: With dead ends: 304 [2024-09-18 15:36:43,479 INFO L226 Difference]: Without dead ends: 233 [2024-09-18 15:36:43,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1564, Invalid=9356, Unknown=0, NotChecked=0, Total=10920 [2024-09-18 15:36:43,480 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:43,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 526 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:36:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-18 15:36:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2024-09-18 15:36:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.0787878787878789) internal successors, (178), 171 states have internal predecessors, (178), 54 states have call successors, (54), 13 states have call predecessors, (54), 12 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 15:36:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 285 transitions. [2024-09-18 15:36:43,516 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 285 transitions. Word has length 94 [2024-09-18 15:36:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:43,516 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 285 transitions. [2024-09-18 15:36:43,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-18 15:36:43,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 285 transitions. [2024-09-18 15:36:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-18 15:36:43,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:43,518 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:43,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-18 15:36:43,721 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 15:36:43,722 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:43,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1191586712, now seen corresponding path program 15 times [2024-09-18 15:36:43,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:43,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94353420] [2024-09-18 15:36:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:43,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:36:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:36:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:36:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:36:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:36:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 15:36:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-18 15:36:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 15:36:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 15:36:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:44,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:44,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94353420] [2024-09-18 15:36:44,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94353420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:44,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184939491] [2024-09-18 15:36:44,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:36:44,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:44,635 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:36:44,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-18 15:36:44,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:44,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:36:44,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:45,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:47,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184939491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:47,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:47,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 83 [2024-09-18 15:36:47,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722740719] [2024-09-18 15:36:47,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:47,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-18 15:36:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-18 15:36:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=6014, Unknown=0, NotChecked=0, Total=6806 [2024-09-18 15:36:47,083 INFO L87 Difference]: Start difference. First operand 232 states and 285 transitions. Second operand has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-18 15:36:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:49,335 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2024-09-18 15:36:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-18 15:36:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 102 [2024-09-18 15:36:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:49,337 INFO L225 Difference]: With dead ends: 296 [2024-09-18 15:36:49,337 INFO L226 Difference]: Without dead ends: 214 [2024-09-18 15:36:49,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1545, Invalid=12027, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:36:49,339 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:49,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:36:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-18 15:36:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2024-09-18 15:36:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 158 states have internal predecessors, (164), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-18 15:36:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 261 transitions. [2024-09-18 15:36:49,371 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 261 transitions. Word has length 102 [2024-09-18 15:36:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:49,371 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 261 transitions. [2024-09-18 15:36:49,371 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-18 15:36:49,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 261 transitions. [2024-09-18 15:36:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-18 15:36:49,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:49,373 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:49,385 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 15:36:49,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:49,577 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:49,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1669102750, now seen corresponding path program 16 times [2024-09-18 15:36:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489937993] [2024-09-18 15:36:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:36:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:36:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:36:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:36:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:36:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:36:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-18 15:36:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:36:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:36:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 88 proven. 212 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489937993] [2024-09-18 15:36:50,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489937993] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37710777] [2024-09-18 15:36:50,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:36:50,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:50,081 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 15:36:50,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:36:50,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:50,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:36:50,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:50,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:36:50,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37710777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:50,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:50,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-18 15:36:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933452595] [2024-09-18 15:36:50,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:50,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-18 15:36:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-18 15:36:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2024-09-18 15:36:50,975 INFO L87 Difference]: Start difference. First operand 213 states and 261 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:36:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:51,359 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2024-09-18 15:36:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:36:51,360 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 103 [2024-09-18 15:36:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:51,362 INFO L225 Difference]: With dead ends: 226 [2024-09-18 15:36:51,362 INFO L226 Difference]: Without dead ends: 224 [2024-09-18 15:36:51,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 191 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=815, Invalid=4015, Unknown=0, NotChecked=0, Total=4830 [2024-09-18 15:36:51,367 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:51,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:36:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-18 15:36:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2024-09-18 15:36:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 159 states have (on average 1.0754716981132075) internal successors, (171), 165 states have internal predecessors, (171), 51 states have call successors, (51), 13 states have call predecessors, (51), 12 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-09-18 15:36:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2024-09-18 15:36:51,409 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 103 [2024-09-18 15:36:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:51,409 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2024-09-18 15:36:51,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:36:51,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2024-09-18 15:36:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-18 15:36:51,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:51,411 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:51,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-18 15:36:51,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:51,615 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1553398150, now seen corresponding path program 17 times [2024-09-18 15:36:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486817868] [2024-09-18 15:36:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:51,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:36:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:36:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:36:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:36:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:36:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:36:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-18 15:36:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:36:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:36:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:36:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:36:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486817868] [2024-09-18 15:36:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486817868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957000481] [2024-09-18 15:36:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:36:52,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:52,591 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:52,592 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 15:36:52,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-18 15:36:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:52,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-18 15:36:52,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-18 15:36:53,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-18 15:36:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957000481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:55,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 92 [2024-09-18 15:36:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361170647] [2024-09-18 15:36:55,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:55,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-18 15:36:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-18 15:36:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=7323, Unknown=0, NotChecked=0, Total=8372 [2024-09-18 15:36:55,364 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-18 15:36:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:59,379 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2024-09-18 15:36:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-18 15:36:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 110 [2024-09-18 15:36:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:59,385 INFO L225 Difference]: With dead ends: 348 [2024-09-18 15:36:59,385 INFO L226 Difference]: Without dead ends: 267 [2024-09-18 15:36:59,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2480, Invalid=15610, Unknown=0, NotChecked=0, Total=18090 [2024-09-18 15:36:59,386 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:59,387 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 619 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 15:36:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-18 15:36:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-09-18 15:36:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 196 states have internal predecessors, (205), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2024-09-18 15:36:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2024-09-18 15:36:59,435 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 110 [2024-09-18 15:36:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:59,436 INFO L474 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2024-09-18 15:36:59,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-18 15:36:59,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2024-09-18 15:36:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-18 15:36:59,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:59,441 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:59,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-18 15:36:59,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-18 15:36:59,641 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:59,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1041518760, now seen corresponding path program 18 times [2024-09-18 15:36:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071540173] [2024-09-18 15:36:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:37:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:37:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:37:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:37:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:37:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-18 15:37:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-18 15:37:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:37:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 15:37:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:37:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-18 15:37:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:37:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-18 15:37:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-18 15:37:00,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:00,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071540173] [2024-09-18 15:37:00,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071540173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:00,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982550414] [2024-09-18 15:37:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:37:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:00,624 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:00,626 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 15:37:00,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-18 15:37:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:00,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-18 15:37:00,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-18 15:37:01,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-18 15:37:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982550414] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:03,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:03,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 95 [2024-09-18 15:37:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968877302] [2024-09-18 15:37:03,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:03,619 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-09-18 15:37:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-09-18 15:37:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=7771, Unknown=0, NotChecked=0, Total=8930 [2024-09-18 15:37:03,620 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-18 15:37:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:06,772 INFO L93 Difference]: Finished difference Result 383 states and 461 transitions. [2024-09-18 15:37:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-18 15:37:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 118 [2024-09-18 15:37:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:06,776 INFO L225 Difference]: With dead ends: 383 [2024-09-18 15:37:06,776 INFO L226 Difference]: Without dead ends: 295 [2024-09-18 15:37:06,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2389, Invalid=14123, Unknown=0, NotChecked=0, Total=16512 [2024-09-18 15:37:06,778 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:06,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 753 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-18 15:37:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-18 15:37:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-09-18 15:37:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 215 states have internal predecessors, (224), 71 states have call successors, (71), 14 states have call predecessors, (71), 13 states have return successors, (70), 63 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-18 15:37:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 365 transitions. [2024-09-18 15:37:06,833 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 365 transitions. Word has length 118 [2024-09-18 15:37:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:06,833 INFO L474 AbstractCegarLoop]: Abstraction has 293 states and 365 transitions. [2024-09-18 15:37:06,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-18 15:37:06,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 365 transitions. [2024-09-18 15:37:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-18 15:37:06,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:06,835 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:06,848 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-18 15:37:07,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:07,040 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:07,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -327161530, now seen corresponding path program 19 times [2024-09-18 15:37:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434118404] [2024-09-18 15:37:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:37:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:37:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 15:37:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:37:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:37:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:37:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-18 15:37:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-18 15:37:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-18 15:37:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-18 15:37:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:37:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-18 15:37:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-18 15:37:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-18 15:37:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-18 15:37:08,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:08,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434118404] [2024-09-18 15:37:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434118404] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:08,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574323619] [2024-09-18 15:37:08,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:37:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:08,258 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:08,258 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 15:37:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:08,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-18 15:37:08,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-18 15:37:09,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-18 15:37:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574323619] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:11,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:11,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 86 [2024-09-18 15:37:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349365272] [2024-09-18 15:37:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:11,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-18 15:37:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-18 15:37:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6287, Unknown=0, NotChecked=0, Total=7310 [2024-09-18 15:37:11,085 INFO L87 Difference]: Start difference. First operand 293 states and 365 transitions. Second operand has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-18 15:37:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:14,924 INFO L93 Difference]: Finished difference Result 433 states and 526 transitions. [2024-09-18 15:37:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-18 15:37:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 126 [2024-09-18 15:37:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:14,927 INFO L225 Difference]: With dead ends: 433 [2024-09-18 15:37:14,927 INFO L226 Difference]: Without dead ends: 342 [2024-09-18 15:37:14,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2163, Invalid=12117, Unknown=0, NotChecked=0, Total=14280 [2024-09-18 15:37:14,928 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:14,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 886 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 15:37:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-18 15:37:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2024-09-18 15:37:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 241 states have (on average 1.070539419087137) internal successors, (258), 248 states have internal predecessors, (258), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (84), 77 states have call predecessors, (84), 84 states have call successors, (84) [2024-09-18 15:37:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2024-09-18 15:37:14,993 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 126 [2024-09-18 15:37:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:14,994 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2024-09-18 15:37:14,994 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-18 15:37:14,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2024-09-18 15:37:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-18 15:37:14,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:14,999 INFO L216 NwaCegarLoop]: trace histogram [27, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:15,013 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-18 15:37:15,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-18 15:37:15,203 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:15,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1728201798, now seen corresponding path program 20 times [2024-09-18 15:37:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:15,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855547137] [2024-09-18 15:37:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:37:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:37:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:37:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:37:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:37:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:37:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-18 15:37:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:37:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:37:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:37:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-18 15:37:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-18 15:37:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 349 proven. 275 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:37:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855547137] [2024-09-18 15:37:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855547137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321163011] [2024-09-18 15:37:16,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:37:16,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:16,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 15:37:16,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:37:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:16,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-18 15:37:16,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:37:17,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:37:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321163011] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:18,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:18,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 113 [2024-09-18 15:37:18,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277620167] [2024-09-18 15:37:18,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:18,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-09-18 15:37:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-09-18 15:37:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2594, Invalid=10062, Unknown=0, NotChecked=0, Total=12656 [2024-09-18 15:37:18,549 INFO L87 Difference]: Start difference. First operand 341 states and 427 transitions. Second operand has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 15:37:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:19,928 INFO L93 Difference]: Finished difference Result 762 states and 985 transitions. [2024-09-18 15:37:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-18 15:37:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 124 [2024-09-18 15:37:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:19,932 INFO L225 Difference]: With dead ends: 762 [2024-09-18 15:37:19,932 INFO L226 Difference]: Without dead ends: 760 [2024-09-18 15:37:19,933 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4040, Invalid=15420, Unknown=0, NotChecked=0, Total=19460 [2024-09-18 15:37:19,934 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 49 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:19,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1086 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:37:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-18 15:37:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 759. [2024-09-18 15:37:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 520 states have (on average 1.0326923076923078) internal successors, (537), 534 states have internal predecessors, (537), 223 states have call successors, (223), 16 states have call predecessors, (223), 15 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-18 15:37:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 982 transitions. [2024-09-18 15:37:20,074 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 982 transitions. Word has length 124 [2024-09-18 15:37:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:20,075 INFO L474 AbstractCegarLoop]: Abstraction has 759 states and 982 transitions. [2024-09-18 15:37:20,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 15:37:20,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 982 transitions. [2024-09-18 15:37:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-18 15:37:20,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:20,081 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:20,094 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-18 15:37:20,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-18 15:37:20,286 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:20,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1782177000, now seen corresponding path program 21 times [2024-09-18 15:37:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:20,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549928566] [2024-09-18 15:37:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:20,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:37:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:37:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:37:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:37:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-18 15:37:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-18 15:37:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:37:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 15:37:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:37:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-18 15:37:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-18 15:37:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-18 15:37:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-18 15:37:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-18 15:37:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-18 15:37:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:37:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549928566] [2024-09-18 15:37:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549928566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764789189] [2024-09-18 15:37:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:37:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:21,685 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:21,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 15:37:21,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-18 15:37:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:21,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-18 15:37:21,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:37:23,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-18 15:37:25,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764789189] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:25,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 107 [2024-09-18 15:37:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285338853] [2024-09-18 15:37:25,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:25,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-09-18 15:37:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-09-18 15:37:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=10042, Unknown=0, NotChecked=0, Total=11342 [2024-09-18 15:37:25,636 INFO L87 Difference]: Start difference. First operand 759 states and 982 transitions. Second operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-18 15:37:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:29,094 INFO L93 Difference]: Finished difference Result 812 states and 1026 transitions. [2024-09-18 15:37:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-18 15:37:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 134 [2024-09-18 15:37:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:29,103 INFO L225 Difference]: With dead ends: 812 [2024-09-18 15:37:29,103 INFO L226 Difference]: Without dead ends: 710 [2024-09-18 15:37:29,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2595, Invalid=20661, Unknown=0, NotChecked=0, Total=23256 [2024-09-18 15:37:29,110 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:29,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 621 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:37:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-09-18 15:37:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2024-09-18 15:37:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 487 states have (on average 1.0328542094455853) internal successors, (503), 500 states have internal predecessors, (503), 208 states have call successors, (208), 15 states have call predecessors, (208), 14 states have return successors, (207), 194 states have call predecessors, (207), 207 states have call successors, (207) [2024-09-18 15:37:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 918 transitions. [2024-09-18 15:37:29,271 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 918 transitions. Word has length 134 [2024-09-18 15:37:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:29,271 INFO L474 AbstractCegarLoop]: Abstraction has 710 states and 918 transitions. [2024-09-18 15:37:29,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-18 15:37:29,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 918 transitions. [2024-09-18 15:37:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-18 15:37:29,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:29,274 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:29,291 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-18 15:37:29,477 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 15:37:29,478 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:29,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1880897274, now seen corresponding path program 22 times [2024-09-18 15:37:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134215405] [2024-09-18 15:37:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:30,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:30,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:37:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:37:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:37:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:37:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:37:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-18 15:37:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:37:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 15:37:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-18 15:37:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 15:37:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-18 15:37:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-18 15:37:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-18 15:37:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-18 15:37:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-18 15:37:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-18 15:37:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:37:31,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:31,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134215405] [2024-09-18 15:37:31,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134215405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522988838] [2024-09-18 15:37:31,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:37:31,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:31,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:31,051 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:31,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-18 15:37:31,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:37:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:31,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-18 15:37:31,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:37:32,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:37:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522988838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:34,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:34,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 96 [2024-09-18 15:37:34,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545213359] [2024-09-18 15:37:34,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:34,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-18 15:37:34,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:34,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-18 15:37:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=7846, Unknown=0, NotChecked=0, Total=9120 [2024-09-18 15:37:34,412 INFO L87 Difference]: Start difference. First operand 710 states and 918 transitions. Second operand has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-18 15:37:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:39,617 INFO L93 Difference]: Finished difference Result 889 states and 1127 transitions. [2024-09-18 15:37:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-09-18 15:37:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 142 [2024-09-18 15:37:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:39,622 INFO L225 Difference]: With dead ends: 889 [2024-09-18 15:37:39,622 INFO L226 Difference]: Without dead ends: 788 [2024-09-18 15:37:39,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2715, Invalid=15107, Unknown=0, NotChecked=0, Total=17822 [2024-09-18 15:37:39,623 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:39,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1023 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-18 15:37:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2024-09-18 15:37:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 778. [2024-09-18 15:37:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 534 states have (on average 1.0355805243445693) internal successors, (553), 547 states have internal predecessors, (553), 228 states have call successors, (228), 16 states have call predecessors, (228), 15 states have return successors, (227), 214 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-18 15:37:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1008 transitions. [2024-09-18 15:37:39,787 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1008 transitions. Word has length 142 [2024-09-18 15:37:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:39,787 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1008 transitions. [2024-09-18 15:37:39,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-18 15:37:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1008 transitions. [2024-09-18 15:37:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-18 15:37:39,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:39,791 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:39,806 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-18 15:37:39,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 15:37:39,992 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:39,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:39,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1580304088, now seen corresponding path program 23 times [2024-09-18 15:37:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:39,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754882406] [2024-09-18 15:37:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:37:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:37:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:37:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-18 15:37:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-18 15:37:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:37:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:37:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:37:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-18 15:37:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-18 15:37:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-18 15:37:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-18 15:37:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-18 15:37:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-18 15:37:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-18 15:37:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-18 15:37:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-18 15:37:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-18 15:37:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754882406] [2024-09-18 15:37:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754882406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045758911] [2024-09-18 15:37:41,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:37:41,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:41,543 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:41,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-18 15:37:41,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-18 15:37:41,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:41,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-18 15:37:41,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-18 15:37:43,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:37:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-18 15:37:46,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045758911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:37:46,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:37:46,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2024-09-18 15:37:46,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908298941] [2024-09-18 15:37:46,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:37:46,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-18 15:37:46,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:37:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-18 15:37:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=12916, Unknown=0, NotChecked=0, Total=14762 [2024-09-18 15:37:46,678 INFO L87 Difference]: Start difference. First operand 778 states and 1008 transitions. Second operand has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-18 15:37:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:37:54,344 INFO L93 Difference]: Finished difference Result 915 states and 1163 transitions. [2024-09-18 15:37:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-18 15:37:54,348 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 150 [2024-09-18 15:37:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:37:54,355 INFO L225 Difference]: With dead ends: 915 [2024-09-18 15:37:54,355 INFO L226 Difference]: Without dead ends: 807 [2024-09-18 15:37:54,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10129 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4440, Invalid=27780, Unknown=0, NotChecked=0, Total=32220 [2024-09-18 15:37:54,357 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:37:54,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1064 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-18 15:37:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-09-18 15:37:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2024-09-18 15:37:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 554 states have (on average 1.036101083032491) internal successors, (574), 567 states have internal predecessors, (574), 237 states have call successors, (237), 16 states have call predecessors, (237), 15 states have return successors, (236), 223 states have call predecessors, (236), 236 states have call successors, (236) [2024-09-18 15:37:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1047 transitions. [2024-09-18 15:37:54,549 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1047 transitions. Word has length 150 [2024-09-18 15:37:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:37:54,549 INFO L474 AbstractCegarLoop]: Abstraction has 807 states and 1047 transitions. [2024-09-18 15:37:54,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-18 15:37:54,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1047 transitions. [2024-09-18 15:37:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-09-18 15:37:54,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:37:54,552 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:37:54,568 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-18 15:37:54,756 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:54,756 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:37:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:37:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1176594234, now seen corresponding path program 24 times [2024-09-18 15:37:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:37:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712419151] [2024-09-18 15:37:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:37:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:37:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:37:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:37:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:37:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:37:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:37:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:37:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:37:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 15:37:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-18 15:37:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 15:37:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 15:37:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-18 15:37:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-18 15:37:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-18 15:37:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-18 15:37:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-18 15:37:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-18 15:37:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-18 15:37:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-18 15:37:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:37:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:37:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:37:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712419151] [2024-09-18 15:37:56,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712419151] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:37:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380213087] [2024-09-18 15:37:56,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:37:56,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:37:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:37:56,220 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:37:56,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-18 15:37:56,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-18 15:37:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:37:56,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-18 15:37:56,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:37:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:37:57,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:38:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:38:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380213087] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:38:00,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:38:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 106 [2024-09-18 15:38:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722946490] [2024-09-18 15:38:00,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:38:00,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-09-18 15:38:00,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:38:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-09-18 15:38:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1553, Invalid=9577, Unknown=0, NotChecked=0, Total=11130 [2024-09-18 15:38:00,250 INFO L87 Difference]: Start difference. First operand 807 states and 1047 transitions. Second operand has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-18 15:38:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:38:06,872 INFO L93 Difference]: Finished difference Result 956 states and 1213 transitions. [2024-09-18 15:38:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-18 15:38:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 158 [2024-09-18 15:38:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:38:06,883 INFO L225 Difference]: With dead ends: 956 [2024-09-18 15:38:06,883 INFO L226 Difference]: Without dead ends: 845 [2024-09-18 15:38:06,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3331, Invalid=18425, Unknown=0, NotChecked=0, Total=21756 [2024-09-18 15:38:06,888 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:38:06,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1352 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-18 15:38:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2024-09-18 15:38:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2024-09-18 15:38:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 575 states have (on average 1.0365217391304349) internal successors, (596), 588 states have internal predecessors, (596), 245 states have call successors, (245), 17 states have call predecessors, (245), 16 states have return successors, (244), 231 states have call predecessors, (244), 244 states have call successors, (244) [2024-09-18 15:38:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1085 transitions. [2024-09-18 15:38:07,219 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1085 transitions. Word has length 158 [2024-09-18 15:38:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:38:07,221 INFO L474 AbstractCegarLoop]: Abstraction has 837 states and 1085 transitions. [2024-09-18 15:38:07,221 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-18 15:38:07,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1085 transitions. [2024-09-18 15:38:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-18 15:38:07,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:38:07,228 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:38:07,241 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-18 15:38:07,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-18 15:38:07,429 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:38:07,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash -902421144, now seen corresponding path program 25 times [2024-09-18 15:38:07,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:38:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632954224] [2024-09-18 15:38:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:38:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:38:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:38:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:38:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:38:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:38:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:38:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:38:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:38:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:38:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-18 15:38:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:38:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:38:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:38:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-18 15:38:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-18 15:38:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-18 15:38:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-18 15:38:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-18 15:38:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-18 15:38:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-09-18 15:38:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-09-18 15:38:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-18 15:38:09,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:38:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632954224] [2024-09-18 15:38:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632954224] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:38:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092066610] [2024-09-18 15:38:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:38:09,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:38:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:38:09,289 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:38:09,290 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-18 15:38:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:09,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-18 15:38:09,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:38:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-18 15:38:10,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:38:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-18 15:38:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092066610] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:38:13,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:38:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 111 [2024-09-18 15:38:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56194685] [2024-09-18 15:38:13,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:38:13,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-18 15:38:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:38:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-18 15:38:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1703, Invalid=10507, Unknown=0, NotChecked=0, Total=12210 [2024-09-18 15:38:13,807 INFO L87 Difference]: Start difference. First operand 837 states and 1085 transitions. Second operand has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-18 15:38:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:38:21,162 INFO L93 Difference]: Finished difference Result 989 states and 1253 transitions. [2024-09-18 15:38:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-18 15:38:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 166 [2024-09-18 15:38:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:38:21,166 INFO L225 Difference]: With dead ends: 989 [2024-09-18 15:38:21,167 INFO L226 Difference]: Without dead ends: 871 [2024-09-18 15:38:21,168 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3663, Invalid=20207, Unknown=0, NotChecked=0, Total=23870 [2024-09-18 15:38:21,168 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:38:21,169 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1220 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-18 15:38:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2024-09-18 15:38:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 864. [2024-09-18 15:38:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 594 states have (on average 1.037037037037037) internal successors, (616), 607 states have internal predecessors, (616), 252 states have call successors, (252), 18 states have call predecessors, (252), 17 states have return successors, (251), 238 states have call predecessors, (251), 251 states have call successors, (251) [2024-09-18 15:38:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1119 transitions. [2024-09-18 15:38:21,389 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1119 transitions. Word has length 166 [2024-09-18 15:38:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:38:21,390 INFO L474 AbstractCegarLoop]: Abstraction has 864 states and 1119 transitions. [2024-09-18 15:38:21,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-18 15:38:21,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1119 transitions. [2024-09-18 15:38:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-09-18 15:38:21,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:38:21,393 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:38:21,407 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-18 15:38:21,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-18 15:38:21,597 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:38:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1015830662, now seen corresponding path program 26 times [2024-09-18 15:38:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:38:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187995344] [2024-09-18 15:38:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:38:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:38:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:38:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:38:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:38:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:38:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:38:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-18 15:38:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-18 15:38:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:38:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 15:38:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:38:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-18 15:38:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:38:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-18 15:38:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-18 15:38:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-18 15:38:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-18 15:38:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2024-09-18 15:38:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-09-18 15:38:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-18 15:38:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-18 15:38:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-09-18 15:38:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-18 15:38:23,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:38:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187995344] [2024-09-18 15:38:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187995344] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:38:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112661451] [2024-09-18 15:38:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:38:23,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:38:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:38:23,656 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:38:23,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-18 15:38:23,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:38:23,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:38:23,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-18 15:38:23,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:38:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-18 15:38:25,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:38:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-18 15:38:28,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112661451] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:38:28,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:38:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 116 [2024-09-18 15:38:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559430272] [2024-09-18 15:38:28,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:38:28,599 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-18 15:38:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:38:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-18 15:38:28,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1860, Invalid=11480, Unknown=0, NotChecked=0, Total=13340 [2024-09-18 15:38:28,601 INFO L87 Difference]: Start difference. First operand 864 states and 1119 transitions. Second operand has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-18 15:38:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:38:37,015 INFO L93 Difference]: Finished difference Result 1019 states and 1289 transitions. [2024-09-18 15:38:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-18 15:38:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 174 [2024-09-18 15:38:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:38:37,019 INFO L225 Difference]: With dead ends: 1019 [2024-09-18 15:38:37,019 INFO L226 Difference]: Without dead ends: 894 [2024-09-18 15:38:37,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6957 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4011, Invalid=22071, Unknown=0, NotChecked=0, Total=26082 [2024-09-18 15:38:37,021 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:38:37,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1344 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-18 15:38:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2024-09-18 15:38:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2024-09-18 15:38:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 611 states have (on average 1.0376432078559739) internal successors, (634), 624 states have internal predecessors, (634), 258 states have call successors, (258), 19 states have call predecessors, (258), 18 states have return successors, (257), 244 states have call predecessors, (257), 257 states have call successors, (257) [2024-09-18 15:38:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1149 transitions. [2024-09-18 15:38:37,237 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1149 transitions. Word has length 174 [2024-09-18 15:38:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:38:37,237 INFO L474 AbstractCegarLoop]: Abstraction has 888 states and 1149 transitions. [2024-09-18 15:38:37,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-18 15:38:37,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1149 transitions. [2024-09-18 15:38:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-18 15:38:37,240 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:38:37,240 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:38:37,256 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-18 15:38:37,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:38:37,445 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:38:37,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1982537304, now seen corresponding path program 27 times [2024-09-18 15:38:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:38:37,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477134181] [2024-09-18 15:38:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:38:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:38:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:38:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:38:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 15:38:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:38:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:38:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:38:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-18 15:38:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-18 15:38:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-18 15:38:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-18 15:38:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:38:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-18 15:38:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-18 15:38:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-18 15:38:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-18 15:38:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-09-18 15:38:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-18 15:38:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-09-18 15:38:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2024-09-18 15:38:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-09-18 15:38:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-09-18 15:38:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-18 15:38:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-18 15:38:39,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:38:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477134181] [2024-09-18 15:38:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477134181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:38:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833720812] [2024-09-18 15:38:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:38:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:38:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:38:39,502 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:38:39,503 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-18 15:38:39,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-18 15:38:39,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:38:39,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-18 15:38:39,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:38:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-18 15:38:41,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:38:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-18 15:38:44,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833720812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:38:44,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:38:44,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 121 [2024-09-18 15:38:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830203731] [2024-09-18 15:38:44,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:38:44,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-09-18 15:38:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:38:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-09-18 15:38:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=12496, Unknown=0, NotChecked=0, Total=14520 [2024-09-18 15:38:44,723 INFO L87 Difference]: Start difference. First operand 888 states and 1149 transitions. Second operand has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-18 15:38:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:38:53,502 INFO L93 Difference]: Finished difference Result 1042 states and 1318 transitions. [2024-09-18 15:38:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-09-18 15:38:53,503 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 182 [2024-09-18 15:38:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:38:53,507 INFO L225 Difference]: With dead ends: 1042 [2024-09-18 15:38:53,507 INFO L226 Difference]: Without dead ends: 910 [2024-09-18 15:38:53,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4375, Invalid=24017, Unknown=0, NotChecked=0, Total=28392 [2024-09-18 15:38:53,509 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:38:53,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1452 Invalid, 5868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-18 15:38:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-09-18 15:38:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 905. [2024-09-18 15:38:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 623 states have (on average 1.0385232744783306) internal successors, (647), 636 states have internal predecessors, (647), 263 states have call successors, (263), 19 states have call predecessors, (263), 18 states have return successors, (262), 249 states have call predecessors, (262), 262 states have call successors, (262) [2024-09-18 15:38:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1172 transitions. [2024-09-18 15:38:53,752 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1172 transitions. Word has length 182 [2024-09-18 15:38:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:38:53,752 INFO L474 AbstractCegarLoop]: Abstraction has 905 states and 1172 transitions. [2024-09-18 15:38:53,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-18 15:38:53,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1172 transitions. [2024-09-18 15:38:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-09-18 15:38:53,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:38:53,756 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:38:53,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-18 15:38:53,960 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-18 15:38:53,961 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:38:53,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:38:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 151586886, now seen corresponding path program 28 times [2024-09-18 15:38:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:38:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436807298] [2024-09-18 15:38:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:38:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:38:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:38:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:38:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:38:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 15:38:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-18 15:38:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-18 15:38:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:38:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 15:38:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:38:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-18 15:38:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-18 15:38:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-18 15:38:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-18 15:38:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-18 15:38:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-18 15:38:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-18 15:38:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2024-09-18 15:38:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-18 15:38:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2024-09-18 15:38:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2024-09-18 15:38:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2024-09-18 15:38:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2024-09-18 15:38:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-09-18 15:38:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:38:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-18 15:38:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:38:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436807298] [2024-09-18 15:38:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436807298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:38:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266648992] [2024-09-18 15:38:56,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:38:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:38:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:38:56,331 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:38:56,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-18 15:38:56,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:38:56,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:38:56,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-18 15:38:56,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:38:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-18 15:38:57,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:39:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-18 15:39:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266648992] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:39:01,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:39:01,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 126 [2024-09-18 15:39:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144618365] [2024-09-18 15:39:01,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:39:01,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-09-18 15:39:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:39:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-09-18 15:39:01,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=13555, Unknown=0, NotChecked=0, Total=15750 [2024-09-18 15:39:01,475 INFO L87 Difference]: Start difference. First operand 905 states and 1172 transitions. Second operand has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-18 15:39:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:39:10,008 INFO L93 Difference]: Finished difference Result 1062 states and 1343 transitions. [2024-09-18 15:39:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-18 15:39:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 190 [2024-09-18 15:39:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:39:10,013 INFO L225 Difference]: With dead ends: 1062 [2024-09-18 15:39:10,013 INFO L226 Difference]: Without dead ends: 927 [2024-09-18 15:39:10,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8138 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4755, Invalid=26045, Unknown=0, NotChecked=0, Total=30800 [2024-09-18 15:39:10,015 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:39:10,015 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1649 Invalid, 6379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-18 15:39:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-09-18 15:39:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2024-09-18 15:39:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 636 states have (on average 1.0393081761006289) internal successors, (661), 649 states have internal predecessors, (661), 267 states have call successors, (267), 20 states have call predecessors, (267), 19 states have return successors, (266), 253 states have call predecessors, (266), 266 states have call successors, (266) [2024-09-18 15:39:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1194 transitions. [2024-09-18 15:39:10,257 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1194 transitions. Word has length 190 [2024-09-18 15:39:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:39:10,257 INFO L474 AbstractCegarLoop]: Abstraction has 923 states and 1194 transitions. [2024-09-18 15:39:10,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-18 15:39:10,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1194 transitions. [2024-09-18 15:39:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-09-18 15:39:10,260 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:39:10,260 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:39:10,275 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-18 15:39:10,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:39:10,464 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:39:10,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2012303896, now seen corresponding path program 29 times [2024-09-18 15:39:10,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:39:10,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109378376] [2024-09-18 15:39:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:39:10,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:39:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:39:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:39:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:39:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:39:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:39:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-18 15:39:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-18 15:39:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 15:39:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-18 15:39:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 15:39:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-18 15:39:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-18 15:39:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-18 15:39:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-18 15:39:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-18 15:39:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-18 15:39:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-09-18 15:39:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-18 15:39:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-09-18 15:39:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2024-09-18 15:39:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-18 15:39:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-18 15:39:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-18 15:39:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2024-09-18 15:39:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-18 15:39:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:39:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109378376] [2024-09-18 15:39:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109378376] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:39:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134235872] [2024-09-18 15:39:12,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:39:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:39:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:39:12,875 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:39:12,879 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-18 15:39:12,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-18 15:39:12,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:39:12,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-18 15:39:12,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:39:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-18 15:39:14,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:39:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-18 15:39:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134235872] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:39:18,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:39:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 131 [2024-09-18 15:39:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495861442] [2024-09-18 15:39:18,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:39:18,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-09-18 15:39:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:39:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-09-18 15:39:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2373, Invalid=14657, Unknown=0, NotChecked=0, Total=17030 [2024-09-18 15:39:18,691 INFO L87 Difference]: Start difference. First operand 923 states and 1194 transitions. Second operand has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-18 15:39:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:39:28,318 INFO L93 Difference]: Finished difference Result 1083 states and 1367 transitions. [2024-09-18 15:39:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-18 15:39:28,319 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 198 [2024-09-18 15:39:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:39:28,323 INFO L225 Difference]: With dead ends: 1083 [2024-09-18 15:39:28,323 INFO L226 Difference]: Without dead ends: 941 [2024-09-18 15:39:28,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=5151, Invalid=28155, Unknown=0, NotChecked=0, Total=33306 [2024-09-18 15:39:28,325 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 6704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:39:28,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1674 Invalid, 6704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-18 15:39:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2024-09-18 15:39:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2024-09-18 15:39:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 647 states have (on average 1.0401854714064915) internal successors, (673), 660 states have internal predecessors, (673), 270 states have call successors, (270), 21 states have call predecessors, (270), 20 states have return successors, (269), 256 states have call predecessors, (269), 269 states have call successors, (269) [2024-09-18 15:39:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1212 transitions. [2024-09-18 15:39:28,595 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1212 transitions. Word has length 198 [2024-09-18 15:39:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:39:28,595 INFO L474 AbstractCegarLoop]: Abstraction has 938 states and 1212 transitions. [2024-09-18 15:39:28,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-18 15:39:28,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1212 transitions. [2024-09-18 15:39:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-09-18 15:39:28,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:39:28,598 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:39:28,611 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-18 15:39:28,800 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-18 15:39:28,801 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:39:28,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -277829626, now seen corresponding path program 30 times [2024-09-18 15:39:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:39:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416256314] [2024-09-18 15:39:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:39:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:39:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:39:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:39:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:39:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-18 15:39:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-18 15:39:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:39:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:39:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:39:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-18 15:39:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-18 15:39:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-18 15:39:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-18 15:39:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-18 15:39:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-18 15:39:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-18 15:39:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-18 15:39:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-18 15:39:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-18 15:39:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-18 15:39:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-18 15:39:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-18 15:39:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-09-18 15:39:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-18 15:39:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2024-09-18 15:39:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2024-09-18 15:39:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-18 15:39:31,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:39:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416256314] [2024-09-18 15:39:31,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416256314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:39:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374441042] [2024-09-18 15:39:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:39:31,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:39:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:39:31,176 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:39:31,177 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-18 15:39:31,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-18 15:39:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:39:31,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-18 15:39:31,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:39:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-18 15:39:34,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:39:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-18 15:39:39,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374441042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:39:39,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:39:39,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 161 [2024-09-18 15:39:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083332771] [2024-09-18 15:39:39,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:39:39,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2024-09-18 15:39:39,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:39:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2024-09-18 15:39:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=22849, Unknown=0, NotChecked=0, Total=25760 [2024-09-18 15:39:39,119 INFO L87 Difference]: Start difference. First operand 938 states and 1212 transitions. Second operand has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-18 15:39:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:39:48,982 INFO L93 Difference]: Finished difference Result 1019 states and 1277 transitions. [2024-09-18 15:39:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-18 15:39:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Word has length 206 [2024-09-18 15:39:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:39:48,987 INFO L225 Difference]: With dead ends: 1019 [2024-09-18 15:39:48,987 INFO L226 Difference]: Without dead ends: 866 [2024-09-18 15:39:48,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14020 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=5952, Invalid=48570, Unknown=0, NotChecked=0, Total=54522 [2024-09-18 15:39:48,990 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:39:48,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1401 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-18 15:39:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-09-18 15:39:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2024-09-18 15:39:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 599 states have (on average 1.0417362270450752) internal successors, (624), 611 states have internal predecessors, (624), 246 states have call successors, (246), 21 states have call predecessors, (246), 20 states have return successors, (245), 233 states have call predecessors, (245), 245 states have call successors, (245) [2024-09-18 15:39:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1115 transitions. [2024-09-18 15:39:49,231 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1115 transitions. Word has length 206 [2024-09-18 15:39:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:39:49,232 INFO L474 AbstractCegarLoop]: Abstraction has 866 states and 1115 transitions. [2024-09-18 15:39:49,232 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-18 15:39:49,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1115 transitions. [2024-09-18 15:39:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-09-18 15:39:49,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:39:49,234 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:39:49,247 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-18 15:39:49,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-18 15:39:49,435 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:39:49,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:39:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1387820504, now seen corresponding path program 31 times [2024-09-18 15:39:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:39:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468408104] [2024-09-18 15:39:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:39:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:39:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:39:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:39:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:39:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:39:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:39:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-18 15:39:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 15:39:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-18 15:39:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 15:39:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 15:39:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-18 15:39:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-18 15:39:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-18 15:39:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-18 15:39:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-18 15:39:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-18 15:39:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-18 15:39:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-18 15:39:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2024-09-18 15:39:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-18 15:39:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2024-09-18 15:39:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-09-18 15:39:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2024-09-18 15:39:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2024-09-18 15:39:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2024-09-18 15:39:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2024-09-18 15:39:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 902 proven. 449 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-18 15:39:51,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:39:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468408104] [2024-09-18 15:39:51,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468408104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:39:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076653973] [2024-09-18 15:39:51,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:39:51,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:39:51,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:39:51,863 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:39:51,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-18 15:39:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:39:51,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-18 15:39:51,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:39:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-18 15:39:53,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:39:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-18 15:39:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076653973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:39:58,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:39:58,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 141 [2024-09-18 15:39:58,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539219992] [2024-09-18 15:39:58,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:39:58,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-18 15:39:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:39:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-18 15:39:58,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2750, Invalid=16990, Unknown=0, NotChecked=0, Total=19740 [2024-09-18 15:39:58,012 INFO L87 Difference]: Start difference. First operand 866 states and 1115 transitions. Second operand has 141 states, 140 states have (on average 1.6) internal successors, (224), 139 states have internal predecessors, (224), 77 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-18 15:40:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:09,536 INFO L93 Difference]: Finished difference Result 1033 states and 1299 transitions. [2024-09-18 15:40:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-09-18 15:40:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 1.6) internal successors, (224), 139 states have internal predecessors, (224), 77 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Word has length 214 [2024-09-18 15:40:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:09,541 INFO L225 Difference]: With dead ends: 1033 [2024-09-18 15:40:09,541 INFO L226 Difference]: Without dead ends: 881 [2024-09-18 15:40:09,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 396 SyntacticMatches, 3 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10362 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=5991, Invalid=32621, Unknown=0, NotChecked=0, Total=38612 [2024-09-18 15:40:09,543 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 7626 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 7987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 7626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:09,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1996 Invalid, 7987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 7626 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-18 15:40:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2024-09-18 15:40:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2024-09-18 15:40:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 609 states have (on average 1.0459770114942528) internal successors, (637), 622 states have internal predecessors, (637), 249 states have call successors, (249), 21 states have call predecessors, (249), 20 states have return successors, (248), 235 states have call predecessors, (248), 248 states have call successors, (248) [2024-09-18 15:40:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1134 transitions. [2024-09-18 15:40:09,772 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1134 transitions. Word has length 214 [2024-09-18 15:40:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:09,772 INFO L474 AbstractCegarLoop]: Abstraction has 879 states and 1134 transitions. [2024-09-18 15:40:09,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 1.6) internal successors, (224), 139 states have internal predecessors, (224), 77 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-18 15:40:09,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1134 transitions. [2024-09-18 15:40:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-09-18 15:40:09,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:09,775 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:09,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:09,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-18 15:40:09,980 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:09,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1591687110, now seen corresponding path program 32 times [2024-09-18 15:40:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847328168] [2024-09-18 15:40:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:09,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:40:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 15:40:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:40:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:40:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:40:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:40:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-18 15:40:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-18 15:40:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:40:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:40:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-18 15:40:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-18 15:40:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-18 15:40:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-18 15:40:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-18 15:40:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-18 15:40:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-09-18 15:40:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-09-18 15:40:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2024-09-18 15:40:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2024-09-18 15:40:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2024-09-18 15:40:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-09-18 15:40:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2024-09-18 15:40:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-09-18 15:40:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2024-09-18 15:40:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2024-09-18 15:40:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 977 proven. 480 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2024-09-18 15:40:13,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:13,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847328168] [2024-09-18 15:40:13,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847328168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:13,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098408905] [2024-09-18 15:40:13,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:13,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:13,133 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:40:13,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-18 15:40:13,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:13,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-18 15:40:13,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2024-09-18 15:40:15,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2024-09-18 15:40:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098408905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:19,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 146 [2024-09-18 15:40:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363690280] [2024-09-18 15:40:19,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:19,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-09-18 15:40:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-09-18 15:40:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2949, Invalid=18221, Unknown=0, NotChecked=0, Total=21170 [2024-09-18 15:40:19,871 INFO L87 Difference]: Start difference. First operand 879 states and 1134 transitions. Second operand has 146 states, 145 states have (on average 1.6) internal successors, (232), 144 states have internal predecessors, (232), 80 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-09-18 15:40:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:32,495 INFO L93 Difference]: Finished difference Result 1119 states and 1412 transitions. [2024-09-18 15:40:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-09-18 15:40:32,496 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.6) internal successors, (232), 144 states have internal predecessors, (232), 80 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Word has length 222 [2024-09-18 15:40:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:32,500 INFO L225 Difference]: With dead ends: 1119 [2024-09-18 15:40:32,500 INFO L226 Difference]: Without dead ends: 964 [2024-09-18 15:40:32,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 411 SyntacticMatches, 3 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11124 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=6435, Invalid=34977, Unknown=0, NotChecked=0, Total=41412 [2024-09-18 15:40:32,503 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 7999 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 8355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 7999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:32,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1991 Invalid, 8355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 7999 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-18 15:40:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2024-09-18 15:40:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 963. [2024-09-18 15:40:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 666 states have (on average 1.0435435435435436) internal successors, (695), 679 states have internal predecessors, (695), 275 states have call successors, (275), 22 states have call predecessors, (275), 21 states have return successors, (274), 261 states have call predecessors, (274), 274 states have call successors, (274) [2024-09-18 15:40:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1244 transitions. [2024-09-18 15:40:32,789 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1244 transitions. Word has length 222 [2024-09-18 15:40:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:32,789 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1244 transitions. [2024-09-18 15:40:32,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.6) internal successors, (232), 144 states have internal predecessors, (232), 80 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-09-18 15:40:32,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1244 transitions. [2024-09-18 15:40:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2024-09-18 15:40:32,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:32,792 INFO L216 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:32,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-18 15:40:32,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-18 15:40:32,996 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:32,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1659074152, now seen corresponding path program 33 times [2024-09-18 15:40:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:32,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160547669] [2024-09-18 15:40:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:32,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:40:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:40:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:40:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-18 15:40:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-18 15:40:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:40:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 15:40:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:40:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-18 15:40:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:40:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-18 15:40:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-18 15:40:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-18 15:40:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-18 15:40:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2024-09-18 15:40:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-09-18 15:40:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-18 15:40:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-18 15:40:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-09-18 15:40:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-09-18 15:40:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2024-09-18 15:40:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2024-09-18 15:40:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2024-09-18 15:40:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2024-09-18 15:40:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2024-09-18 15:40:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2024-09-18 15:40:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2024-09-18 15:40:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 1055 proven. 512 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2024-09-18 15:40:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160547669] [2024-09-18 15:40:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160547669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833395384] [2024-09-18 15:40:36,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:40:36,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:36,343 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:40:36,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process