./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:09:37,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:09:37,469 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:09:37,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:09:37,477 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:09:37,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:09:37,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:09:37,502 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:09:37,503 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:09:37,503 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:09:37,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:09:37,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:09:37,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:09:37,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:09:37,505 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:09:37,506 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:09:37,506 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:09:37,506 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:09:37,507 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:09:37,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:09:37,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:09:37,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:09:37,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:09:37,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:09:37,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:09:37,510 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:09:37,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:09:37,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:09:37,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:09:37,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:09:37,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:09:37,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:09:37,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:09:37,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:09:37,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:09:37,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:09:37,514 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:09:37,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:09:37,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:09:37,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:09:37,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:09:37,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:09:37,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:09:37,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:09:37,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:09:37,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:09:37,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:09:37,836 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:09:37,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-25 00:09:39,439 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:09:39,629 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:09:39,630 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-25 00:09:39,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/aa0c16785/30932dc11b7d47b4baa1524ebdb8664f/FLAGfc77f170c [2024-09-25 00:09:40,008 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/aa0c16785/30932dc11b7d47b4baa1524ebdb8664f [2024-09-25 00:09:40,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:09:40,013 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:09:40,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:09:40,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:09:40,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:09:40,023 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,024 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a93b423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40, skipping insertion in model container [2024-09-25 00:09:40,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,044 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:09:40,204 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2024-09-25 00:09:40,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:09:40,218 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:09:40,229 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2024-09-25 00:09:40,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:09:40,246 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:09:40,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40 WrapperNode [2024-09-25 00:09:40,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:09:40,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:09:40,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:09:40,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:09:40,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,267 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:09:40,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:09:40,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:09:40,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:09:40,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:09:40,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,298 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,309 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]. [2024-09-25 00:09:40,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,311 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:09:40,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:09:40,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:09:40,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:09:40,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (1/1) ... [2024-09-25 00:09:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:09:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:40,366 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) [2024-09-25 00:09:40,372 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 [2024-09-25 00:09:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:09:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:09:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:09:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:09:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:09:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-09-25 00:09:40,418 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-09-25 00:09:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:09:40,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:09:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:09:40,491 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:09:40,494 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:09:40,648 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-25 00:09:40,649 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:09:40,681 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:09:40,681 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 00:09:40,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:09:40 BoogieIcfgContainer [2024-09-25 00:09:40,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:09:40,684 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:09:40,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:09:40,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:09:40,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:09:40" (1/3) ... [2024-09-25 00:09:40,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e74849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:09:40, skipping insertion in model container [2024-09-25 00:09:40,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:40" (2/3) ... [2024-09-25 00:09:40,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e74849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:09:40, skipping insertion in model container [2024-09-25 00:09:40,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:09:40" (3/3) ... [2024-09-25 00:09:40,694 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2024-09-25 00:09:40,712 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:09:40,712 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:09:40,777 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:09:40,784 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;@331727e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:09:40,785 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:09:40,790 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) [2024-09-25 00:09:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 00:09:40,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:40,799 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:40,800 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:40,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 661201948, now seen corresponding path program 1 times [2024-09-25 00:09:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093780646] [2024-09-25 00:09:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:09:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093780646] [2024-09-25 00:09:41,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093780646] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:09:41,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:09:41,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 00:09:41,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479016110] [2024-09-25 00:09:41,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:09:41,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 00:09:41,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 00:09:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 00:09:41,234 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) [2024-09-25 00:09:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:41,305 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-25 00:09:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 00:09:41,309 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 [2024-09-25 00:09:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:41,315 INFO L225 Difference]: With dead ends: 30 [2024-09-25 00:09:41,315 INFO L226 Difference]: Without dead ends: 18 [2024-09-25 00:09:41,317 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 [2024-09-25 00:09:41,321 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:41,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:09:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-25 00:09:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-25 00:09:41,367 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) [2024-09-25 00:09:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-25 00:09:41,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-25 00:09:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:41,370 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-25 00:09:41,371 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) [2024-09-25 00:09:41,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-25 00:09:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 00:09:41,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:41,374 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:41,374 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:09:41,375 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:41,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 36081636, now seen corresponding path program 1 times [2024-09-25 00:09:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045539060] [2024-09-25 00:09:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:09:41,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045539060] [2024-09-25 00:09:41,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045539060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378021386] [2024-09-25 00:09:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:41,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:41,687 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) [2024-09-25 00:09:41,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:09:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:41,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 00:09:41,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:09:41,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:09:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378021386] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:42,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:42,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-09-25 00:09:42,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45242556] [2024-09-25 00:09:42,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:42,151 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 00:09:42,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 00:09:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-25 00:09:42,154 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) [2024-09-25 00:09:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:42,230 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-25 00:09:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 00:09:42,231 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 [2024-09-25 00:09:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:42,232 INFO L225 Difference]: With dead ends: 25 [2024-09-25 00:09:42,232 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 00:09:42,233 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 [2024-09-25 00:09:42,234 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:42,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 00:09:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-25 00:09:42,240 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) [2024-09-25 00:09:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-25 00:09:42,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-25 00:09:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:42,241 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-25 00:09:42,242 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) [2024-09-25 00:09:42,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-25 00:09:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 00:09:42,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:42,243 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:42,262 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:09:42,447 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 [2024-09-25 00:09:42,448 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:42,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1588422884, now seen corresponding path program 2 times [2024-09-25 00:09:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:42,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758596788] [2024-09-25 00:09:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 00:09:42,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:42,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758596788] [2024-09-25 00:09:42,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758596788] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:42,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639236289] [2024-09-25 00:09:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:09:42,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:42,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:42,724 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) [2024-09-25 00:09:42,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:09:42,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:09:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:42,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 00:09:42,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 00:09:42,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 00:09:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639236289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:43,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:43,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-09-25 00:09:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555212301] [2024-09-25 00:09:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:43,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 00:09:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 00:09:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-25 00:09:43,220 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) [2024-09-25 00:09:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:43,306 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-25 00:09:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:09:43,306 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 [2024-09-25 00:09:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:43,307 INFO L225 Difference]: With dead ends: 28 [2024-09-25 00:09:43,307 INFO L226 Difference]: Without dead ends: 24 [2024-09-25 00:09:43,308 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 [2024-09-25 00:09:43,309 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:43,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-25 00:09:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-25 00:09:43,319 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) [2024-09-25 00:09:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-25 00:09:43,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-25 00:09:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:43,321 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-25 00:09:43,321 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) [2024-09-25 00:09:43,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-25 00:09:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 00:09:43,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:43,323 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:43,344 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 00:09:43,523 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 [2024-09-25 00:09:43,524 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:43,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1668608796, now seen corresponding path program 3 times [2024-09-25 00:09:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584740058] [2024-09-25 00:09:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:09:43,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:43,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584740058] [2024-09-25 00:09:43,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584740058] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183789283] [2024-09-25 00:09:43,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:09:43,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:43,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:43,761 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) [2024-09-25 00:09:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:09:43,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:09:43,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:43,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 00:09:43,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:09:43,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:09:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183789283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:44,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:44,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-09-25 00:09:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301168445] [2024-09-25 00:09:44,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:44,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 00:09:44,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 00:09:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-25 00:09:44,425 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) [2024-09-25 00:09:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:44,501 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-25 00:09:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:09:44,502 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 [2024-09-25 00:09:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:44,503 INFO L225 Difference]: With dead ends: 31 [2024-09-25 00:09:44,503 INFO L226 Difference]: Without dead ends: 27 [2024-09-25 00:09:44,505 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 [2024-09-25 00:09:44,506 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 [2024-09-25 00:09:44,506 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] [2024-09-25 00:09:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-25 00:09:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-25 00:09:44,516 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) [2024-09-25 00:09:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-25 00:09:44,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-25 00:09:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:44,521 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-25 00:09:44,521 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) [2024-09-25 00:09:44,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-25 00:09:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 00:09:44,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:44,523 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:44,537 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 00:09:44,723 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 [2024-09-25 00:09:44,724 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:44,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2054436324, now seen corresponding path program 4 times [2024-09-25 00:09:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828163508] [2024-09-25 00:09:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:44,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:09:45,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828163508] [2024-09-25 00:09:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828163508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:45,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379128259] [2024-09-25 00:09:45,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:09:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:45,012 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) [2024-09-25 00:09:45,013 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:09:45,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:09:45,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:45,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 00:09:45,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:09:45,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 00:09:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379128259] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:45,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-09-25 00:09:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791225701] [2024-09-25 00:09:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:45,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 00:09:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 00:09:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:09:45,900 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) [2024-09-25 00:09:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:45,990 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-25 00:09:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:09:45,990 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 [2024-09-25 00:09:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:45,992 INFO L225 Difference]: With dead ends: 34 [2024-09-25 00:09:45,992 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 00:09:45,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:09:45,993 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 [2024-09-25 00:09:45,993 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] [2024-09-25 00:09:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 00:09:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-25 00:09:46,004 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) [2024-09-25 00:09:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-25 00:09:46,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-25 00:09:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:46,007 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-25 00:09:46,007 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) [2024-09-25 00:09:46,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-25 00:09:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 00:09:46,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:46,009 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:46,028 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:09:46,209 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 [2024-09-25 00:09:46,210 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2043660772, now seen corresponding path program 5 times [2024-09-25 00:09:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:46,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180564805] [2024-09-25 00:09:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:09:46,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180564805] [2024-09-25 00:09:46,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180564805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998372278] [2024-09-25 00:09:46,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:09:46,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:46,577 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) [2024-09-25 00:09:46,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:09:46,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 00:09:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:46,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 00:09:46,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:09:46,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:09:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998372278] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:47,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-09-25 00:09:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085080208] [2024-09-25 00:09:47,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:47,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 00:09:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 00:09:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-25 00:09:47,837 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) [2024-09-25 00:09:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:47,942 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-25 00:09:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:09:47,943 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 [2024-09-25 00:09:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:47,944 INFO L225 Difference]: With dead ends: 37 [2024-09-25 00:09:47,944 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 00:09:47,945 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-09-25 00:09:47,946 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:47,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 70 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 00:09:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 00:09:47,952 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) [2024-09-25 00:09:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-25 00:09:47,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-25 00:09:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:47,953 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-25 00:09:47,953 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) [2024-09-25 00:09:47,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-25 00:09:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 00:09:47,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:47,955 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:47,975 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:09:48,155 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 [2024-09-25 00:09:48,156 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:48,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 776256796, now seen corresponding path program 6 times [2024-09-25 00:09:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247725950] [2024-09-25 00:09:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-25 00:09:48,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:48,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247725950] [2024-09-25 00:09:48,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247725950] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:48,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301792775] [2024-09-25 00:09:48,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:09:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:48,547 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) [2024-09-25 00:09:48,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:09:48,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 00:09:48,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:48,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 00:09:48,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-25 00:09:48,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 00:09:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301792775] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:50,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-09-25 00:09:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110777830] [2024-09-25 00:09:50,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:50,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:09:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:09:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:09:50,145 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) [2024-09-25 00:09:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:50,242 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-25 00:09:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:09:50,243 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 [2024-09-25 00:09:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:50,244 INFO L225 Difference]: With dead ends: 40 [2024-09-25 00:09:50,244 INFO L226 Difference]: Without dead ends: 36 [2024-09-25 00:09:50,245 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 [2024-09-25 00:09:50,245 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:50,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-25 00:09:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-25 00:09:50,252 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) [2024-09-25 00:09:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-25 00:09:50,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-25 00:09:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:50,253 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-25 00:09:50,253 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) [2024-09-25 00:09:50,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-25 00:09:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 00:09:50,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:50,255 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:50,269 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 00:09:50,455 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 [2024-09-25 00:09:50,456 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:50,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1513830684, now seen corresponding path program 7 times [2024-09-25 00:09:50,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867669245] [2024-09-25 00:09:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 00:09:50,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867669245] [2024-09-25 00:09:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867669245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149504101] [2024-09-25 00:09:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:09:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:50,894 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) [2024-09-25 00:09:50,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:09:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:50,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 00:09:50,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 00:09:51,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 00:09:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149504101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:52,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-09-25 00:09:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452496314] [2024-09-25 00:09:52,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:52,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:09:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:09:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:09:52,897 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) [2024-09-25 00:09:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:53,013 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-25 00:09:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:09:53,013 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 [2024-09-25 00:09:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:53,015 INFO L225 Difference]: With dead ends: 43 [2024-09-25 00:09:53,015 INFO L226 Difference]: Without dead ends: 39 [2024-09-25 00:09:53,015 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 [2024-09-25 00:09:53,016 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:53,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-25 00:09:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-25 00:09:53,022 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) [2024-09-25 00:09:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-25 00:09:53,023 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-25 00:09:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:53,023 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-25 00:09:53,024 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) [2024-09-25 00:09:53,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-25 00:09:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-25 00:09:53,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:53,025 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:53,045 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:09:53,229 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 [2024-09-25 00:09:53,230 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:53,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 296579100, now seen corresponding path program 8 times [2024-09-25 00:09:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616100056] [2024-09-25 00:09:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-25 00:09:53,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:53,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616100056] [2024-09-25 00:09:53,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616100056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:53,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578307352] [2024-09-25 00:09:53,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:09:53,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:53,753 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) [2024-09-25 00:09:53,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:09:53,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:09:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:53,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 00:09:53,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-25 00:09:53,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 00:09:56,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578307352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:56,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-09-25 00:09:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23157519] [2024-09-25 00:09:56,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:56,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 00:09:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 00:09:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:09:56,471 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) [2024-09-25 00:09:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:56,632 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-25 00:09:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:09:56,633 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 [2024-09-25 00:09:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:56,636 INFO L225 Difference]: With dead ends: 46 [2024-09-25 00:09:56,636 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 00:09:56,637 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 [2024-09-25 00:09:56,637 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 [2024-09-25 00:09:56,637 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] [2024-09-25 00:09:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 00:09:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-25 00:09:56,650 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) [2024-09-25 00:09:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-25 00:09:56,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-25 00:09:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:56,652 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-25 00:09:56,652 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) [2024-09-25 00:09:56,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-25 00:09:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-25 00:09:56,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:56,656 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:56,679 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 00:09:56,857 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 [2024-09-25 00:09:56,857 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:56,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1875246108, now seen corresponding path program 9 times [2024-09-25 00:09:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229358079] [2024-09-25 00:09:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:56,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:56,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 00:09:57,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229358079] [2024-09-25 00:09:57,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229358079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748604557] [2024-09-25 00:09:57,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:09:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:57,547 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) [2024-09-25 00:09:57,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:09:57,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 00:09:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:57,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 00:09:57,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 00:09:57,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 00:10:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748604557] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:01,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:01,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-09-25 00:10:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852598468] [2024-09-25 00:10:01,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:01,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:10:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:10:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-25 00:10:01,190 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) [2024-09-25 00:10:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:01,344 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-25 00:10:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:10:01,345 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 [2024-09-25 00:10:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:01,346 INFO L225 Difference]: With dead ends: 49 [2024-09-25 00:10:01,346 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 00:10:01,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 00:10:01,347 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-25 00:10:01,348 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] [2024-09-25 00:10:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 00:10:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 00:10:01,354 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) [2024-09-25 00:10:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-25 00:10:01,354 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-25 00:10:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:01,355 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-25 00:10:01,355 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) [2024-09-25 00:10:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-25 00:10:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 00:10:01,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:01,357 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:01,377 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:01,558 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 [2024-09-25 00:10:01,558 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:01,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1040850148, now seen corresponding path program 10 times [2024-09-25 00:10:01,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:01,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90436677] [2024-09-25 00:10:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:01,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-25 00:10:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90436677] [2024-09-25 00:10:02,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90436677] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948204628] [2024-09-25 00:10:02,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:10:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:02,265 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) [2024-09-25 00:10:02,266 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:10:02,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:10:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:02,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 00:10:02,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-25 00:10:02,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 00:10:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948204628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:07,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:07,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-09-25 00:10:07,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677147907] [2024-09-25 00:10:07,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:07,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 00:10:07,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 00:10:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-09-25 00:10:07,334 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) [2024-09-25 00:10:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:07,503 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-25 00:10:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:10:07,504 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 [2024-09-25 00:10:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:07,505 INFO L225 Difference]: With dead ends: 52 [2024-09-25 00:10:07,505 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 00:10:07,506 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 00:10:07,507 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 [2024-09-25 00:10:07,507 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] [2024-09-25 00:10:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 00:10:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-25 00:10:07,517 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) [2024-09-25 00:10:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-25 00:10:07,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-25 00:10:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:07,519 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-25 00:10:07,519 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) [2024-09-25 00:10:07,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-25 00:10:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-25 00:10:07,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:07,523 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:07,541 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:07,723 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 [2024-09-25 00:10:07,723 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:07,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 218071268, now seen corresponding path program 11 times [2024-09-25 00:10:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:07,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134289328] [2024-09-25 00:10:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-25 00:10:08,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134289328] [2024-09-25 00:10:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134289328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832430240] [2024-09-25 00:10:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:10:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:08,481 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) [2024-09-25 00:10:08,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:10:08,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 00:10:08,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:08,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 00:10:08,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-25 00:10:08,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 00:10:14,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832430240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:14,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-09-25 00:10:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727645162] [2024-09-25 00:10:14,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:14,636 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 00:10:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 00:10:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:10:14,638 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) [2024-09-25 00:10:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:14,784 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-25 00:10:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:10:14,784 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 [2024-09-25 00:10:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:14,785 INFO L225 Difference]: With dead ends: 55 [2024-09-25 00:10:14,785 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 00:10:14,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 00:10:14,786 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 [2024-09-25 00:10:14,787 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] [2024-09-25 00:10:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 00:10:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-25 00:10:14,793 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) [2024-09-25 00:10:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-25 00:10:14,793 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-25 00:10:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:14,794 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-25 00:10:14,794 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) [2024-09-25 00:10:14,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-25 00:10:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 00:10:14,795 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:14,795 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:14,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:14,999 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 [2024-09-25 00:10:15,000 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:15,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash -313649636, now seen corresponding path program 12 times [2024-09-25 00:10:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:15,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596736202] [2024-09-25 00:10:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-25 00:10:15,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:15,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596736202] [2024-09-25 00:10:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596736202] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714031968] [2024-09-25 00:10:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:10:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:15,831 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) [2024-09-25 00:10:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:10:16,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 00:10:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:16,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 00:10:16,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-25 00:10:16,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 00:10:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714031968] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:23,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-09-25 00:10:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297159557] [2024-09-25 00:10:23,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:23,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 00:10:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 00:10:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-09-25 00:10:23,490 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) [2024-09-25 00:10:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:23,678 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-25 00:10:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:10:23,679 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 [2024-09-25 00:10:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:23,679 INFO L225 Difference]: With dead ends: 58 [2024-09-25 00:10:23,680 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 00:10:23,680 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 [2024-09-25 00:10:23,681 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 [2024-09-25 00:10:23,681 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] [2024-09-25 00:10:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 00:10:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 00:10:23,691 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) [2024-09-25 00:10:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-25 00:10:23,692 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-25 00:10:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:23,692 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-25 00:10:23,693 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) [2024-09-25 00:10:23,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-25 00:10:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-25 00:10:23,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:23,694 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:23,710 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:23,898 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 [2024-09-25 00:10:23,899 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:23,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1407532516, now seen corresponding path program 13 times [2024-09-25 00:10:23,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:23,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581177947] [2024-09-25 00:10:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:23,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-25 00:10:24,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581177947] [2024-09-25 00:10:24,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581177947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796945986] [2024-09-25 00:10:24,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:10:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:24,873 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) [2024-09-25 00:10:24,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 00:10:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:25,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 00:10:25,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-25 00:10:25,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 00:10:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796945986] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:34,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-09-25 00:10:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918124557] [2024-09-25 00:10:34,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:34,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 00:10:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 00:10:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 00:10:34,654 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) [2024-09-25 00:10:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:34,857 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-25 00:10:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:10:34,858 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 [2024-09-25 00:10:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:34,861 INFO L225 Difference]: With dead ends: 61 [2024-09-25 00:10:34,861 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 00:10:34,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 00:10:34,864 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 [2024-09-25 00:10:34,865 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] [2024-09-25 00:10:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 00:10:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-25 00:10:34,877 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) [2024-09-25 00:10:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-25 00:10:34,878 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-25 00:10:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:34,878 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-25 00:10:34,882 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) [2024-09-25 00:10:34,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-25 00:10:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-25 00:10:34,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:34,884 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:34,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 00:10:35,084 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 [2024-09-25 00:10:35,085 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:35,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:35,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1575356700, now seen corresponding path program 14 times [2024-09-25 00:10:35,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:35,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904784357] [2024-09-25 00:10:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:35,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-25 00:10:36,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:36,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904784357] [2024-09-25 00:10:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904784357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693141000] [2024-09-25 00:10:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:10:36,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:36,157 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) [2024-09-25 00:10:36,158 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 00:10:36,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:10:36,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:36,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 00:10:36,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-25 00:10:36,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 00:10:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693141000] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:48,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-09-25 00:10:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257492561] [2024-09-25 00:10:48,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:48,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 00:10:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 00:10:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:10:48,189 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) [2024-09-25 00:10:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:48,414 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-25 00:10:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:10:48,414 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 [2024-09-25 00:10:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:48,415 INFO L225 Difference]: With dead ends: 64 [2024-09-25 00:10:48,415 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:10:48,416 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 [2024-09-25 00:10:48,417 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 [2024-09-25 00:10:48,417 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] [2024-09-25 00:10:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:10:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-25 00:10:48,427 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) [2024-09-25 00:10:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-25 00:10:48,428 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-25 00:10:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:48,429 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-25 00:10:48,430 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) [2024-09-25 00:10:48,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-25 00:10:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-25 00:10:48,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:48,432 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:48,454 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:48,633 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 [2024-09-25 00:10:48,633 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:48,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 12270308, now seen corresponding path program 15 times [2024-09-25 00:10:48,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:48,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386389536] [2024-09-25 00:10:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:48,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:48,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:48,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:48,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-25 00:10:49,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386389536] [2024-09-25 00:10:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386389536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570467064] [2024-09-25 00:10:49,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:10:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:49,776 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) [2024-09-25 00:10:49,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 00:10:50,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-25 00:10:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:50,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 00:10:50,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-25 00:10:50,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:11:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 00:11:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570467064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:11:04,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:11:04,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-09-25 00:11:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871117873] [2024-09-25 00:11:04,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:11:04,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 00:11:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:11:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 00:11:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 00:11:04,854 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) [2024-09-25 00:11:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:11:05,075 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-25 00:11:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:11:05,075 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 [2024-09-25 00:11:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:11:05,076 INFO L225 Difference]: With dead ends: 67 [2024-09-25 00:11:05,076 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 00:11:05,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 00:11:05,099 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 [2024-09-25 00:11:05,099 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] [2024-09-25 00:11:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 00:11:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-25 00:11:05,106 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) [2024-09-25 00:11:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-25 00:11:05,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-25 00:11:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:11:05,107 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-25 00:11:05,107 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) [2024-09-25 00:11:05,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-25 00:11:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-25 00:11:05,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:11:05,108 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:11:05,127 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-25 00:11:05,309 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 [2024-09-25 00:11:05,309 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:11:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -101860324, now seen corresponding path program 16 times [2024-09-25 00:11:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:11:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455349670] [2024-09-25 00:11:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:11:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:11:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:11:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:11:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:05,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-25 00:11:06,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:11:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455349670] [2024-09-25 00:11:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455349670] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:11:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665990297] [2024-09-25 00:11:06,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:11:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:06,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:11:06,666 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:11:06,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 00:11:07,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:11:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:11:07,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 00:11:07,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:11:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-25 00:11:07,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:11:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-25 00:11:24,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665990297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:11:24,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:11:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2024-09-25 00:11:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885980915] [2024-09-25 00:11:24,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:11:24,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 00:11:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:11:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 00:11:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:11:24,886 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) [2024-09-25 00:11:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:11:25,075 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-25 00:11:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:11:25,076 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 [2024-09-25 00:11:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:11:25,077 INFO L225 Difference]: With dead ends: 70 [2024-09-25 00:11:25,077 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 00:11:25,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=994, Invalid=2086, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 00:11:25,078 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 [2024-09-25 00:11:25,079 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] [2024-09-25 00:11:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 00:11:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-25 00:11:25,084 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) [2024-09-25 00:11:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-25 00:11:25,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-25 00:11:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:11:25,085 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-25 00:11:25,085 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) [2024-09-25 00:11:25,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-25 00:11:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-25 00:11:25,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:11:25,086 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:11:25,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 00:11:25,287 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 [2024-09-25 00:11:25,287 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:11:25,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash 324106212, now seen corresponding path program 17 times [2024-09-25 00:11:25,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:11:25,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242878899] [2024-09-25 00:11:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:11:25,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:11:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:25,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:11:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:25,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:11:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:25,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:25,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:25,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-25 00:11:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:11:26,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242878899] [2024-09-25 00:11:26,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242878899] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:11:26,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915942620] [2024-09-25 00:11:26,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:11:26,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:26,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:11:26,746 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) [2024-09-25 00:11:26,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 00:11:27,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-25 00:11:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:11:27,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 00:11:27,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:11:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-25 00:11:27,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:11:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-25 00:11:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915942620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:11:48,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:11:48,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2024-09-25 00:11:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222333467] [2024-09-25 00:11:48,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:11:48,726 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 00:11:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:11:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 00:11:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:11:48,728 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) [2024-09-25 00:11:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:11:49,001 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-25 00:11:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 00:11:49,002 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 [2024-09-25 00:11:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:11:49,003 INFO L225 Difference]: With dead ends: 73 [2024-09-25 00:11:49,003 INFO L226 Difference]: Without dead ends: 69 [2024-09-25 00:11:49,004 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 [2024-09-25 00:11:49,004 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 [2024-09-25 00:11:49,005 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] [2024-09-25 00:11:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-25 00:11:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-25 00:11:49,013 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) [2024-09-25 00:11:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-25 00:11:49,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-25 00:11:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:11:49,015 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-25 00:11:49,015 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) [2024-09-25 00:11:49,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-25 00:11:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-25 00:11:49,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:11:49,017 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:11:49,038 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 00:11:49,218 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 [2024-09-25 00:11:49,218 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:11:49,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1013633252, now seen corresponding path program 18 times [2024-09-25 00:11:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:11:49,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069714664] [2024-09-25 00:11:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:11:49,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:11:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:11:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:11:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:49,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-25 00:11:50,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:11:50,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069714664] [2024-09-25 00:11:50,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069714664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:11:50,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713042062] [2024-09-25 00:11:50,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:11:50,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:11:50,557 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) [2024-09-25 00:11:50,557 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 00:11:51,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-25 00:11:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:11:51,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 00:11:51,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:11:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-25 00:11:51,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-25 00:12:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713042062] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:16,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 44 [2024-09-25 00:12:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231051292] [2024-09-25 00:12:16,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:16,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 00:12:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 00:12:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1406, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 00:12:16,629 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) [2024-09-25 00:12:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:16,867 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-25 00:12:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 00:12:16,867 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 [2024-09-25 00:12:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:16,868 INFO L225 Difference]: With dead ends: 76 [2024-09-25 00:12:16,868 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 00:12:16,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 00:12:16,870 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 [2024-09-25 00:12:16,870 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] [2024-09-25 00:12:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 00:12:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-25 00:12:16,874 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) [2024-09-25 00:12:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-25 00:12:16,875 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-25 00:12:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:16,875 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-25 00:12:16,876 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) [2024-09-25 00:12:16,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-25 00:12:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-25 00:12:16,877 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:16,877 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:16,895 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:17,077 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 [2024-09-25 00:12:17,077 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:17,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -277351196, now seen corresponding path program 19 times [2024-09-25 00:12:17,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:17,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718381623] [2024-09-25 00:12:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:17,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:12:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:17,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-25 00:12:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:18,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718381623] [2024-09-25 00:12:18,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718381623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707751589] [2024-09-25 00:12:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:12:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:18,621 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) [2024-09-25 00:12:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 00:12:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:20,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 00:12:20,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-25 00:12:20,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-25 00:12:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707751589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:49,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2024-09-25 00:12:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245219363] [2024-09-25 00:12:49,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:49,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 00:12:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 00:12:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=1539, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:12:49,281 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) [2024-09-25 00:12:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:49,522 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-25 00:12:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 00:12:49,522 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 [2024-09-25 00:12:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:49,523 INFO L225 Difference]: With dead ends: 79 [2024-09-25 00:12:49,523 INFO L226 Difference]: Without dead ends: 75 [2024-09-25 00:12:49,524 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 [2024-09-25 00:12:49,525 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 [2024-09-25 00:12:49,525 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] [2024-09-25 00:12:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-25 00:12:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-25 00:12:49,530 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) [2024-09-25 00:12:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-25 00:12:49,531 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-25 00:12:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:49,531 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-25 00:12:49,531 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) [2024-09-25 00:12:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-25 00:12:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-25 00:12:49,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:49,533 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:49,555 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:49,737 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 [2024-09-25 00:12:49,738 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:49,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash -653499876, now seen corresponding path program 20 times [2024-09-25 00:12:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:49,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056949447] [2024-09-25 00:12:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:49,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:49,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:12:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:50,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-25 00:12:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056949447] [2024-09-25 00:12:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056949447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:51,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842207973] [2024-09-25 00:12:51,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:12:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:51,266 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) [2024-09-25 00:12:51,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 00:12:53,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:12:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:53,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-25 00:12:53,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-25 00:12:53,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 00:13:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842207973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:13:27,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:13:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 48 [2024-09-25 00:13:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525970323] [2024-09-25 00:13:27,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:27,843 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 00:13:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 00:13:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 00:13:27,845 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) [2024-09-25 00:13:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:28,095 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-25 00:13:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 00:13:28,095 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 [2024-09-25 00:13:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:28,096 INFO L225 Difference]: With dead ends: 82 [2024-09-25 00:13:28,096 INFO L226 Difference]: Without dead ends: 78 [2024-09-25 00:13:28,097 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1478, Invalid=3078, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 00:13:28,098 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 [2024-09-25 00:13:28,098 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] [2024-09-25 00:13:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-25 00:13:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-25 00:13:28,103 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) [2024-09-25 00:13:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-25 00:13:28,104 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-25 00:13:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:28,104 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-25 00:13:28,104 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) [2024-09-25 00:13:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-25 00:13:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-25 00:13:28,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:28,106 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:28,126 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-25 00:13:28,306 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 [2024-09-25 00:13:28,306 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:28,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1560195556, now seen corresponding path program 21 times [2024-09-25 00:13:28,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:28,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056284843] [2024-09-25 00:13:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:13:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:28,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-25 00:13:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:29,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056284843] [2024-09-25 00:13:29,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056284843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:29,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122088682] [2024-09-25 00:13:29,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:13:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:29,924 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) [2024-09-25 00:13:29,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 00:13:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-25 00:13:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:32,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-25 00:13:32,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-25 00:13:32,131 INFO L327 TraceCheckSpWp]: Computing backward predicates...