./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_25x0-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_25x0-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:50:28,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:50:28,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:50:28,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:50:28,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:50:28,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:50:28,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:50:28,689 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:50:28,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:50:28,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:50:28,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:50:28,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:50:28,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:50:28,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:50:28,712 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:50:28,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:50:28,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:50:28,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:50:28,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:50:28,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:50:28,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:50:28,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:50:28,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:50:28,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:50:28,716 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:50:28,717 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:50:28,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:50:28,717 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:50:28,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:50:28,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:50:28,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:50:28,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:50:28,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:50:28,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:50:28,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:50:28,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:50:28,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:50:28,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:50:28,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:50:28,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:50:28,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:50:28,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:50:28,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:50:28,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:50:28,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:50:28,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:50:28,963 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:50:28,964 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:50:28,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-13 09:50:30,275 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:50:30,411 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:50:30,412 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-13 09:50:30,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2bf0a62d3/e3382f324d594ffc86f0f1485906ee58/FLAG390079faf [2024-09-13 09:50:30,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2bf0a62d3/e3382f324d594ffc86f0f1485906ee58 [2024-09-13 09:50:30,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:50:30,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:50:30,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:50:30,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:50:30,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:50:30,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65052100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30, skipping insertion in model container [2024-09-13 09:50:30,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,461 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:50:30,634 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2024-09-13 09:50:30,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:50:30,651 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:50:30,663 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2024-09-13 09:50:30,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:50:30,679 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:50:30,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30 WrapperNode [2024-09-13 09:50:30,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:50:30,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:50:30,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:50:30,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:50:30,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,693 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,699 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:50:30,699 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:50:30,700 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:50:30,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:50:30,700 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:50:30,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,709 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,719 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 09:50:30,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:50:30,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:50:30,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:50:30,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:50:30,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (1/1) ... [2024-09-13 09:50:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:50:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:30,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 09:50:30,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 09:50:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:50:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:50:30,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:50:30,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:50:30,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:50:30,821 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-09-13 09:50:30,821 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-09-13 09:50:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:50:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:50:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:50:30,877 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:50:30,879 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:50:30,991 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-13 09:50:30,991 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:50:31,011 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:50:31,012 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 09:50:31,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:50:31 BoogieIcfgContainer [2024-09-13 09:50:31,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:50:31,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:50:31,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:50:31,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:50:31,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:50:30" (1/3) ... [2024-09-13 09:50:31,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c159bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:50:31, skipping insertion in model container [2024-09-13 09:50:31,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:50:30" (2/3) ... [2024-09-13 09:50:31,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c159bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:50:31, skipping insertion in model container [2024-09-13 09:50:31,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:50:31" (3/3) ... [2024-09-13 09:50:31,019 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2024-09-13 09:50:31,032 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:50:31,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:50:31,084 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:50:31,090 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;@368adf06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:50:31,091 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:50:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 09:50:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 09:50:31,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:31,100 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:31,101 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:31,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash 661201948, now seen corresponding path program 1 times [2024-09-13 09:50:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:31,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052342509] [2024-09-13 09:50:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:50:31,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052342509] [2024-09-13 09:50:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052342509] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:50:31,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:50:31,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:50:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881136903] [2024-09-13 09:50:31,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:50:31,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:50:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:50:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:50:31,440 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:50:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:31,512 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-13 09:50:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:50:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-13 09:50:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:31,521 INFO L225 Difference]: With dead ends: 30 [2024-09-13 09:50:31,521 INFO L226 Difference]: Without dead ends: 18 [2024-09-13 09:50:31,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:50:31,529 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:31,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:50:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-13 09:50:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-13 09:50:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 09:50:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-13 09:50:31,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-13 09:50:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:31,561 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-13 09:50:31,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:50:31,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-13 09:50:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 09:50:31,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:31,564 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:31,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:50:31,564 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:31,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 36081636, now seen corresponding path program 1 times [2024-09-13 09:50:31,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:31,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89556474] [2024-09-13 09:50:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 09:50:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89556474] [2024-09-13 09:50:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89556474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109814474] [2024-09-13 09:50:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:31,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:31,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:31,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:50:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:31,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 09:50:31,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 09:50:31,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 09:50:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109814474] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:32,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-09-13 09:50:32,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681062530] [2024-09-13 09:50:32,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:32,064 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 09:50:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 09:50:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:50:32,065 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 09:50:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:32,115 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-13 09:50:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:50:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-13 09:50:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:32,117 INFO L225 Difference]: With dead ends: 25 [2024-09-13 09:50:32,117 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 09:50:32,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:50:32,118 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:32,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 09:50:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-13 09:50:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 09:50:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-13 09:50:32,122 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-13 09:50:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:32,123 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-13 09:50:32,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 09:50:32,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-13 09:50:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 09:50:32,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:32,124 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:32,140 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:50:32,331 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 [2024-09-13 09:50:32,332 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:32,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1588422884, now seen corresponding path program 2 times [2024-09-13 09:50:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:32,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040341926] [2024-09-13 09:50:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:32,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:32,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:32,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:32,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 09:50:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040341926] [2024-09-13 09:50:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040341926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027251432] [2024-09-13 09:50:32,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:50:32,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:32,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:32,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:50:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:50:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:32,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 09:50:32,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 09:50:32,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:50:32,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027251432] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:32,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-09-13 09:50:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640920361] [2024-09-13 09:50:32,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:32,914 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 09:50:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 09:50:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-13 09:50:32,916 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 09:50:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:32,968 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-13 09:50:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:50:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-13 09:50:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:32,970 INFO L225 Difference]: With dead ends: 28 [2024-09-13 09:50:32,971 INFO L226 Difference]: Without dead ends: 24 [2024-09-13 09:50:32,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:50:32,972 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:32,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-13 09:50:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-13 09:50:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 09:50:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-13 09:50:32,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-13 09:50:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:32,979 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-13 09:50:32,979 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 09:50:32,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-13 09:50:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 09:50:32,981 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:32,981 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:32,993 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 09:50:33,181 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 [2024-09-13 09:50:33,182 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:33,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:33,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1668608796, now seen corresponding path program 3 times [2024-09-13 09:50:33,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:33,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607574869] [2024-09-13 09:50:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:50:33,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607574869] [2024-09-13 09:50:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607574869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611795106] [2024-09-13 09:50:33,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:50:33,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:33,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:33,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:33,440 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:50:33,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:50:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:33,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 09:50:33,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:50:33,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:50:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611795106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:33,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:33,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-09-13 09:50:33,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057691488] [2024-09-13 09:50:33,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:33,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 09:50:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 09:50:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:50:33,950 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-13 09:50:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:34,001 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-13 09:50:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:50:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-13 09:50:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:34,002 INFO L225 Difference]: With dead ends: 31 [2024-09-13 09:50:34,002 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 09:50:34,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:50:34,003 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:34,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 09:50:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-13 09:50:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 09:50:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-13 09:50:34,007 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-13 09:50:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:34,008 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-13 09:50:34,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-13 09:50:34,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-13 09:50:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 09:50:34,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:34,009 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:34,021 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 09:50:34,209 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 [2024-09-13 09:50:34,210 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:34,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2054436324, now seen corresponding path program 4 times [2024-09-13 09:50:34,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:34,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768114471] [2024-09-13 09:50:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:34,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 09:50:34,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:34,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768114471] [2024-09-13 09:50:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768114471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:34,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458071179] [2024-09-13 09:50:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:50:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:34,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:34,374 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:50:34,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:50:34,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:34,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 09:50:34,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 09:50:34,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 09:50:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458071179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:34,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-09-13 09:50:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172509049] [2024-09-13 09:50:34,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:34,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:50:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:50:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:50:34,989 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-13 09:50:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:35,041 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-13 09:50:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:50:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-13 09:50:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:35,042 INFO L225 Difference]: With dead ends: 34 [2024-09-13 09:50:35,042 INFO L226 Difference]: Without dead ends: 30 [2024-09-13 09:50:35,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:50:35,043 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:35,044 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-13 09:50:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-13 09:50:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-13 09:50:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-13 09:50:35,048 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-13 09:50:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:35,048 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-13 09:50:35,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-13 09:50:35,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-13 09:50:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 09:50:35,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:35,049 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:35,062 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:50:35,253 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 [2024-09-13 09:50:35,254 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:35,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2043660772, now seen corresponding path program 5 times [2024-09-13 09:50:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:35,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028916668] [2024-09-13 09:50:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:50:35,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:35,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028916668] [2024-09-13 09:50:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028916668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079158912] [2024-09-13 09:50:35,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:50:35,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:35,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:35,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:50:35,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 09:50:35,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:35,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 09:50:35,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:50:35,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:50:36,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079158912] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:36,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:36,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-09-13 09:50:36,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402434958] [2024-09-13 09:50:36,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:36,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:50:36,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:36,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:50:36,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-13 09:50:36,390 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-13 09:50:36,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:36,462 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-13 09:50:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 09:50:36,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-13 09:50:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:36,463 INFO L225 Difference]: With dead ends: 37 [2024-09-13 09:50:36,463 INFO L226 Difference]: Without dead ends: 33 [2024-09-13 09:50:36,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:50:36,464 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:36,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 70 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-13 09:50:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-13 09:50:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-13 09:50:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-13 09:50:36,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-13 09:50:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:36,470 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-13 09:50:36,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-13 09:50:36,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-13 09:50:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 09:50:36,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:36,471 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:36,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:50:36,675 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 [2024-09-13 09:50:36,676 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 776256796, now seen corresponding path program 6 times [2024-09-13 09:50:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847141141] [2024-09-13 09:50:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 09:50:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847141141] [2024-09-13 09:50:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847141141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770643156] [2024-09-13 09:50:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:50:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:36,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:36,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:50:36,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 09:50:36,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:36,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 09:50:36,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 09:50:37,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 09:50:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770643156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:38,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:38,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-09-13 09:50:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382231360] [2024-09-13 09:50:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:38,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 09:50:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 09:50:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:50:38,321 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-13 09:50:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:38,396 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-13 09:50:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 09:50:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-13 09:50:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:38,397 INFO L225 Difference]: With dead ends: 40 [2024-09-13 09:50:38,397 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 09:50:38,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:50:38,398 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:38,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 09:50:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-13 09:50:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-13 09:50:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-13 09:50:38,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-13 09:50:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:38,403 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-13 09:50:38,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-13 09:50:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-13 09:50:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 09:50:38,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:38,405 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:38,419 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 09:50:38,608 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 [2024-09-13 09:50:38,608 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:38,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1513830684, now seen corresponding path program 7 times [2024-09-13 09:50:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:38,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556612796] [2024-09-13 09:50:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 09:50:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:38,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556612796] [2024-09-13 09:50:38,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556612796] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:38,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690767804] [2024-09-13 09:50:38,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:50:38,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:38,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:38,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:38,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:50:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:39,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 09:50:39,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 09:50:39,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:50:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690767804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:40,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:40,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-09-13 09:50:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748208769] [2024-09-13 09:50:40,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:40,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 09:50:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 09:50:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:50:40,730 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-13 09:50:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:40,816 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-13 09:50:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:50:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-13 09:50:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:40,817 INFO L225 Difference]: With dead ends: 43 [2024-09-13 09:50:40,817 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 09:50:40,819 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-09-13 09:50:40,820 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:40,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:50:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 09:50:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-13 09:50:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:50:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-13 09:50:40,824 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-13 09:50:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:40,825 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-13 09:50:40,825 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-13 09:50:40,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-13 09:50:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-13 09:50:40,826 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:40,826 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:40,839 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 09:50:41,030 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 [2024-09-13 09:50:41,031 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:41,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 296579100, now seen corresponding path program 8 times [2024-09-13 09:50:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827406997] [2024-09-13 09:50:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 09:50:41,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827406997] [2024-09-13 09:50:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827406997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799663196] [2024-09-13 09:50:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:50:41,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:41,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:41,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:41,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:50:41,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:50:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:41,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 09:50:41,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 09:50:41,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 09:50:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799663196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:44,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-09-13 09:50:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055620033] [2024-09-13 09:50:44,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:44,525 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 09:50:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 09:50:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-09-13 09:50:44,526 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-13 09:50:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:44,676 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-13 09:50:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 09:50:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-13 09:50:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:44,678 INFO L225 Difference]: With dead ends: 46 [2024-09-13 09:50:44,678 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 09:50:44,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:50:44,678 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:44,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 109 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:50:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 09:50:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-13 09:50:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 09:50:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-13 09:50:44,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-13 09:50:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:44,683 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-13 09:50:44,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-13 09:50:44,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-13 09:50:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-13 09:50:44,685 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:44,685 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:44,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 09:50:44,885 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 [2024-09-13 09:50:44,885 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:44,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1875246108, now seen corresponding path program 9 times [2024-09-13 09:50:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:44,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802961766] [2024-09-13 09:50:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:44,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:44,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:44,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 09:50:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802961766] [2024-09-13 09:50:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802961766] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365899166] [2024-09-13 09:50:45,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:50:45,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:45,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:45,347 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:50:45,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-13 09:50:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:45,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 09:50:45,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 09:50:45,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 09:50:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365899166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:48,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:48,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-09-13 09:50:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863228274] [2024-09-13 09:50:48,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:48,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 09:50:48,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 09:50:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:50:48,589 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-13 09:50:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:48,691 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-13 09:50:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 09:50:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-13 09:50:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:48,692 INFO L225 Difference]: With dead ends: 49 [2024-09-13 09:50:48,692 INFO L226 Difference]: Without dead ends: 45 [2024-09-13 09:50:48,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 09:50:48,693 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:48,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 130 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:50:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-13 09:50:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-13 09:50:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 09:50:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-13 09:50:48,703 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-13 09:50:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:48,703 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-13 09:50:48,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-13 09:50:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-13 09:50:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 09:50:48,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:48,707 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:48,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 09:50:48,907 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 [2024-09-13 09:50:48,908 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:48,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1040850148, now seen corresponding path program 10 times [2024-09-13 09:50:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:48,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003236603] [2024-09-13 09:50:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:48,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-13 09:50:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003236603] [2024-09-13 09:50:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003236603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89239014] [2024-09-13 09:50:49,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:50:49,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:49,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:49,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:50:49,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:50:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:49,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 09:50:49,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-13 09:50:49,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:50:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 09:50:53,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89239014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:50:53,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:50:53,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-09-13 09:50:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193405357] [2024-09-13 09:50:53,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:50:53,583 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 09:50:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:50:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 09:50:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-09-13 09:50:53,585 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-13 09:50:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:50:53,717 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-13 09:50:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:50:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-13 09:50:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:50:53,720 INFO L225 Difference]: With dead ends: 52 [2024-09-13 09:50:53,720 INFO L226 Difference]: Without dead ends: 48 [2024-09-13 09:50:53,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 09:50:53,721 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:50:53,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 116 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:50:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-13 09:50:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-13 09:50:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-13 09:50:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-13 09:50:53,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-13 09:50:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:50:53,729 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-13 09:50:53,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-13 09:50:53,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-13 09:50:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 09:50:53,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:50:53,730 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:50:53,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 09:50:53,930 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 [2024-09-13 09:50:53,931 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:50:53,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:50:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash 218071268, now seen corresponding path program 11 times [2024-09-13 09:50:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:50:53,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437206444] [2024-09-13 09:50:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:50:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:50:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:50:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:50:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:50:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:50:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-13 09:50:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:50:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437206444] [2024-09-13 09:50:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437206444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:50:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062831733] [2024-09-13 09:50:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:50:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:50:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:50:54,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:50:54,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:50:54,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 09:50:54,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:50:54,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:50:54,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:50:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-13 09:50:55,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:51:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 09:51:00,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062831733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:51:00,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:51:00,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-09-13 09:51:00,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301838949] [2024-09-13 09:51:00,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:51:00,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 09:51:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:51:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 09:51:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-09-13 09:51:00,443 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-13 09:51:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:51:00,570 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-13 09:51:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:51:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-13 09:51:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:51:00,571 INFO L225 Difference]: With dead ends: 55 [2024-09-13 09:51:00,571 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 09:51:00,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 09:51:00,572 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:51:00,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 133 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:51:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 09:51:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-13 09:51:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-13 09:51:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-13 09:51:00,578 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-13 09:51:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:51:00,579 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-13 09:51:00,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-13 09:51:00,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-13 09:51:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-13 09:51:00,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:51:00,580 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:51:00,593 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 09:51:00,783 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 [2024-09-13 09:51:00,784 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:51:00,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -313649636, now seen corresponding path program 12 times [2024-09-13 09:51:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:51:00,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581225891] [2024-09-13 09:51:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:51:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:51:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:00,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:51:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:00,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:51:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:00,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-13 09:51:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:51:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581225891] [2024-09-13 09:51:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581225891] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:51:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121166493] [2024-09-13 09:51:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:51:01,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:51:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:51:01,479 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:51:01,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:51:01,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-13 09:51:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:51:01,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 09:51:01,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:51:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-13 09:51:01,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:51:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 09:51:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121166493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:51:07,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:51:07,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-09-13 09:51:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167557075] [2024-09-13 09:51:07,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:51:07,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 09:51:07,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:51:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 09:51:07,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:51:07,821 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-13 09:51:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:51:08,002 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-13 09:51:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 09:51:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-13 09:51:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:51:08,003 INFO L225 Difference]: With dead ends: 58 [2024-09-13 09:51:08,003 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 09:51:08,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 09:51:08,006 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:51:08,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 147 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:51:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 09:51:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-13 09:51:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 09:51:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-13 09:51:08,013 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-13 09:51:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:51:08,015 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-13 09:51:08,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-13 09:51:08,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-13 09:51:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-13 09:51:08,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:51:08,017 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:51:08,035 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 09:51:08,218 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 [2024-09-13 09:51:08,219 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:51:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1407532516, now seen corresponding path program 13 times [2024-09-13 09:51:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:51:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774749265] [2024-09-13 09:51:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:51:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:51:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:51:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:51:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-13 09:51:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:51:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774749265] [2024-09-13 09:51:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774749265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:51:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778147530] [2024-09-13 09:51:08,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:51:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:51:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:51:08,973 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:51:08,975 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:51:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:09,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 09:51:09,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:51:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-13 09:51:09,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:51:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-13 09:51:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778147530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:51:17,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:51:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-09-13 09:51:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565278347] [2024-09-13 09:51:17,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:51:17,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 09:51:17,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:51:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 09:51:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 09:51:17,828 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-13 09:51:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:51:17,985 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-13 09:51:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 09:51:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-13 09:51:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:51:17,987 INFO L225 Difference]: With dead ends: 61 [2024-09-13 09:51:17,987 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 09:51:17,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 09:51:17,988 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:51:17,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 147 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:51:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 09:51:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-13 09:51:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-13 09:51:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-13 09:51:17,994 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-13 09:51:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:51:17,995 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-13 09:51:17,995 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-13 09:51:17,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-13 09:51:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-13 09:51:17,996 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:51:17,996 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:51:18,010 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 09:51:18,200 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 [2024-09-13 09:51:18,201 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:51:18,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1575356700, now seen corresponding path program 14 times [2024-09-13 09:51:18,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:51:18,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173476455] [2024-09-13 09:51:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:51:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:51:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:51:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:51:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-13 09:51:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:51:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173476455] [2024-09-13 09:51:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173476455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:51:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245373657] [2024-09-13 09:51:18,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:51:18,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:51:18,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:51:18,994 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:51:18,996 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 09:51:19,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:51:19,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:51:19,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-13 09:51:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:51:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-13 09:51:19,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:51:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 09:51:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245373657] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:51:30,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:51:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-09-13 09:51:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510302670] [2024-09-13 09:51:30,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:51:30,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 09:51:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:51:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 09:51:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 09:51:30,391 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-13 09:51:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:51:30,594 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-13 09:51:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 09:51:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-13 09:51:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:51:30,595 INFO L225 Difference]: With dead ends: 64 [2024-09-13 09:51:30,595 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 09:51:30,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:51:30,596 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:51:30,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 148 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:51:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 09:51:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-13 09:51:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-13 09:51:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-13 09:51:30,601 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-13 09:51:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:51:30,601 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-13 09:51:30,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-13 09:51:30,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-13 09:51:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-13 09:51:30,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:51:30,602 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:51:30,617 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 09:51:30,806 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 [2024-09-13 09:51:30,806 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:51:30,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash 12270308, now seen corresponding path program 15 times [2024-09-13 09:51:30,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:51:30,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795501336] [2024-09-13 09:51:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:51:30,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:51:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:30,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:51:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:30,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:51:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:30,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-13 09:51:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:51:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795501336] [2024-09-13 09:51:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795501336] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:51:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659215433] [2024-09-13 09:51:31,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:51:31,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:51:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:51:31,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:51:31,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 09:51:32,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-13 09:51:32,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:51:32,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 09:51:32,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:51:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-13 09:51:32,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:51:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-13 09:51:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659215433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:51:44,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:51:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-09-13 09:51:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937151488] [2024-09-13 09:51:44,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:51:44,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 09:51:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:51:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 09:51:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 09:51:44,759 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-13 09:51:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:51:44,928 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-13 09:51:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 09:51:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-13 09:51:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:51:44,929 INFO L225 Difference]: With dead ends: 67 [2024-09-13 09:51:44,929 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 09:51:44,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 09:51:44,930 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:51:44,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:51:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 09:51:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-13 09:51:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-13 09:51:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-13 09:51:44,935 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-13 09:51:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:51:44,935 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-13 09:51:44,935 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-13 09:51:44,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-13 09:51:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-13 09:51:44,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:51:44,936 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:51:44,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 09:51:45,140 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 [2024-09-13 09:51:45,141 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:51:45,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:51:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -101860324, now seen corresponding path program 16 times [2024-09-13 09:51:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:51:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164947862] [2024-09-13 09:51:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:51:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:51:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:51:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:51:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:45,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:46,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:51:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:51:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-13 09:51:46,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:51:46,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164947862] [2024-09-13 09:51:46,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164947862] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:51:46,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083422265] [2024-09-13 09:51:46,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:51:46,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:51:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:51:46,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:51:46,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 09:51:46,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:51:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:51:46,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 09:51:46,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:51:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-13 09:51:46,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:52:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-13 09:52:01,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083422265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:52:01,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:52:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2024-09-13 09:52:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930746537] [2024-09-13 09:52:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:52:01,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 09:52:01,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:52:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 09:52:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 09:52:01,393 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-13 09:52:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:52:01,597 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-13 09:52:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 09:52:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-13 09:52:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:52:01,598 INFO L225 Difference]: With dead ends: 70 [2024-09-13 09:52:01,598 INFO L226 Difference]: Without dead ends: 66 [2024-09-13 09:52:01,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=994, Invalid=2086, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:52:01,600 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:52:01,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 185 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:52:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-13 09:52:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-13 09:52:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2024-09-13 09:52:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-13 09:52:01,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-13 09:52:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:52:01,604 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-13 09:52:01,605 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-13 09:52:01,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-13 09:52:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-13 09:52:01,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:52:01,607 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:52:01,624 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 09:52:01,811 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 [2024-09-13 09:52:01,812 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:52:01,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 324106212, now seen corresponding path program 17 times [2024-09-13 09:52:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:52:01,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162879616] [2024-09-13 09:52:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:52:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:52:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:01,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:52:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:01,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:52:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-13 09:52:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:52:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162879616] [2024-09-13 09:52:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162879616] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:52:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718033103] [2024-09-13 09:52:02,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:52:02,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:52:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:52:02,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:52:02,926 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 09:52:03,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-13 09:52:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:52:03,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-13 09:52:03,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:52:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-13 09:52:04,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:52:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-13 09:52:22,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718033103] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:52:22,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:52:22,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2024-09-13 09:52:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660546795] [2024-09-13 09:52:22,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:52:22,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 09:52:22,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:52:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 09:52:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 09:52:22,441 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-13 09:52:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:52:22,681 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-13 09:52:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:52:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-13 09:52:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:52:22,682 INFO L225 Difference]: With dead ends: 73 [2024-09-13 09:52:22,683 INFO L226 Difference]: Without dead ends: 69 [2024-09-13 09:52:22,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 18 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1106, Invalid=2316, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 09:52:22,684 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 333 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:52:22,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 181 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:52:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-13 09:52:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-13 09:52:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2024-09-13 09:52:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-13 09:52:22,688 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-13 09:52:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:52:22,688 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-13 09:52:22,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-13 09:52:22,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-13 09:52:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 09:52:22,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:52:22,689 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:52:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 09:52:22,893 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 [2024-09-13 09:52:22,894 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:52:22,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1013633252, now seen corresponding path program 18 times [2024-09-13 09:52:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:52:22,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185582296] [2024-09-13 09:52:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:52:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:52:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:52:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:52:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:23,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 09:52:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:52:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185582296] [2024-09-13 09:52:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185582296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:52:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266838290] [2024-09-13 09:52:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:52:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:52:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:52:24,009 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:52:24,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 09:52:25,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-13 09:52:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:52:25,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 09:52:25,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:52:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 09:52:25,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:52:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-13 09:52:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266838290] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:52:47,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:52:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 44 [2024-09-13 09:52:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320631163] [2024-09-13 09:52:47,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:52:47,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 09:52:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:52:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 09:52:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1406, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 09:52:47,718 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-13 09:52:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:52:47,914 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-13 09:52:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 09:52:47,915 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-13 09:52:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:52:47,916 INFO L225 Difference]: With dead ends: 76 [2024-09-13 09:52:47,916 INFO L226 Difference]: Without dead ends: 72 [2024-09-13 09:52:47,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 09:52:47,918 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:52:47,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 193 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:52:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-13 09:52:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-13 09:52:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2024-09-13 09:52:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-13 09:52:47,922 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-13 09:52:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:52:47,922 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-13 09:52:47,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-13 09:52:47,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-13 09:52:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-13 09:52:47,923 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:52:47,923 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:52:47,942 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 09:52:48,127 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 [2024-09-13 09:52:48,127 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:52:48,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:52:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash -277351196, now seen corresponding path program 19 times [2024-09-13 09:52:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:52:48,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295638647] [2024-09-13 09:52:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:52:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:52:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:52:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:52:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:48,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:52:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-13 09:52:49,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:52:49,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295638647] [2024-09-13 09:52:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295638647] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:52:49,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182679199] [2024-09-13 09:52:49,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:52:49,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:52:49,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:52:49,388 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) [2024-09-13 09:52:49,389 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 09:52:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:52:50,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 09:52:50,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:52:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-13 09:52:50,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:53:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-13 09:53:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182679199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:53:17,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:53:17,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2024-09-13 09:53:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969715040] [2024-09-13 09:53:17,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:53:17,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 09:53:17,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:53:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 09:53:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=1539, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 09:53:17,013 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-13 09:53:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:53:17,247 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-13 09:53:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 09:53:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-09-13 09:53:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:53:17,249 INFO L225 Difference]: With dead ends: 79 [2024-09-13 09:53:17,250 INFO L226 Difference]: Without dead ends: 75 [2024-09-13 09:53:17,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 20 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1348, Invalid=2812, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 09:53:17,251 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:53:17,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 201 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:53:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-13 09:53:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-13 09:53:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-13 09:53:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-13 09:53:17,264 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-13 09:53:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:53:17,265 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-13 09:53:17,265 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-13 09:53:17,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:53:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-13 09:53:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-13 09:53:17,266 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:53:17,266 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:53:17,293 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 09:53:17,470 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 [2024-09-13 09:53:17,471 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:53:17,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:53:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash -653499876, now seen corresponding path program 20 times [2024-09-13 09:53:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:53:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931904975] [2024-09-13 09:53:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:53:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:53:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:17,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:53:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:17,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:53:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:17,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:17,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-13 09:53:19,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:53:19,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931904975] [2024-09-13 09:53:19,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931904975] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:53:19,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73182456] [2024-09-13 09:53:19,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:53:19,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:53:19,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:53:19,002 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) [2024-09-13 09:53:19,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 09:53:20,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:53:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:53:20,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 09:53:20,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:53:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-13 09:53:20,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:53:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-13 09:53:54,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73182456] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:53:54,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:53:54,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 48 [2024-09-13 09:53:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513330258] [2024-09-13 09:53:54,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:53:54,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 09:53:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:53:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 09:53:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 09:53:54,098 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-13 09:53:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:53:54,437 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-13 09:53:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 09:53:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-09-13 09:53:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:53:54,439 INFO L225 Difference]: With dead ends: 82 [2024-09-13 09:53:54,439 INFO L226 Difference]: Without dead ends: 78 [2024-09-13 09:53:54,441 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1478, Invalid=3078, Unknown=0, NotChecked=0, Total=4556 [2024-09-13 09:53:54,442 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:53:54,442 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 205 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:53:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-13 09:53:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-13 09:53:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2024-09-13 09:53:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-13 09:53:54,447 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-13 09:53:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:53:54,447 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-13 09:53:54,447 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-13 09:53:54,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:53:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-13 09:53:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-13 09:53:54,448 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:53:54,448 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:53:54,480 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 09:53:54,652 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 [2024-09-13 09:53:54,653 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:53:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:53:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1560195556, now seen corresponding path program 21 times [2024-09-13 09:53:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:53:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903571347] [2024-09-13 09:53:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:53:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:53:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:54,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:53:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:54,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:53:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:54,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:55,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:53:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:53:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-13 09:53:56,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:53:56,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903571347] [2024-09-13 09:53:56,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903571347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:53:56,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860450095] [2024-09-13 09:53:56,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:53:56,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:53:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:53:56,255 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) [2024-09-13 09:53:56,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 09:53:58,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-13 09:53:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:53:58,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-13 09:53:58,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:53:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-13 09:53:58,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:54:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-13 09:54:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860450095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:54:32,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:54:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 50 [2024-09-13 09:54:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963947119] [2024-09-13 09:54:32,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:54:32,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:54:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:54:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:54:32,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=1823, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:54:32,643 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 26 states have call successors, (27), 1 states have call predecessors, (27), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2024-09-13 09:54:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:54:32,898 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2024-09-13 09:54:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 09:54:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 26 states have call successors, (27), 1 states have call predecessors, (27), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) Word has length 139 [2024-09-13 09:54:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:54:32,900 INFO L225 Difference]: With dead ends: 85 [2024-09-13 09:54:32,900 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 09:54:32,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 278 SyntacticMatches, 22 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1614, Invalid=3356, Unknown=0, NotChecked=0, Total=4970 [2024-09-13 09:54:32,902 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:54:32,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 225 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:54:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 09:54:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-13 09:54:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2024-09-13 09:54:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-09-13 09:54:32,906 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2024-09-13 09:54:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:54:32,906 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-09-13 09:54:32,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 26 states have call successors, (27), 1 states have call predecessors, (27), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2024-09-13 09:54:32,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:54:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-09-13 09:54:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-13 09:54:32,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:54:32,907 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:54:32,928 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 09:54:33,111 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 [2024-09-13 09:54:33,111 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:54:33,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:54:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1954764060, now seen corresponding path program 22 times [2024-09-13 09:54:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:54:33,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154235111] [2024-09-13 09:54:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:54:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:54:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:54:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:54:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:33,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:54:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:54:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2024-09-13 09:54:34,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:54:34,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154235111] [2024-09-13 09:54:34,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154235111] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:54:34,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36209177] [2024-09-13 09:54:34,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:54:34,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:54:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:54:34,868 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) [2024-09-13 09:54:34,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 09:54:37,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:54:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:54:37,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-13 09:54:37,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:54:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2024-09-13 09:54:37,322 INFO L327 TraceCheckSpWp]: Computing backward predicates...