./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_20x0-2.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 ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_20x0-2.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 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --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-ca4ee3d-m [2024-09-20 19:51:33,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:51:33,396 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:51:33,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:51:33,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:51:33,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:51:33,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:51:33,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:51:33,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:51:33,428 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:51:33,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:51:33,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:51:33,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:51:33,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:51:33,429 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:51:33,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:51:33,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:51:33,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:51:33,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:51:33,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:51:33,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:51:33,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:51:33,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:51:33,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:51:33,432 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:51:33,433 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:51:33,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:51:33,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:51:33,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:51:33,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:51:33,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:51:33,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:51:33,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:33,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:51:33,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:51:33,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:51:33,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:51:33,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:51:33,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:51:33,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:51:33,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:51:33,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:51:33,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:51:33,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:51:33,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:51:33,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:51:33,659 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:51:33,660 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:51:33,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-09-20 19:51:34,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:51:35,031 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:51:35,031 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-09-20 19:51:35,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6f95a1fe8/dbf09030dd4c416f8ef303c5735471cb/FLAG2928895ef [2024-09-20 19:51:35,052 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6f95a1fe8/dbf09030dd4c416f8ef303c5735471cb [2024-09-20 19:51:35,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:51:35,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:51:35,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:35,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:51:35,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:51:35,064 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,065 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66011f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35, skipping insertion in model container [2024-09-20 19:51:35,065 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,080 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:51:35,196 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_20x0-2.c[481,494] [2024-09-20 19:51:35,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:35,208 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:51:35,220 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_20x0-2.c[481,494] [2024-09-20 19:51:35,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:35,233 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:51:35,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35 WrapperNode [2024-09-20 19:51:35,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:35,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:35,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:51:35,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:51:35,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,249 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:51:35,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:35,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:51:35,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:51:35,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:51:35,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,267 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]. [2024-09-20 19:51:35,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,269 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:51:35,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:51:35,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:51:35,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:51:35,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (1/1) ... [2024-09-20 19:51:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:35,297 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) [2024-09-20 19:51:35,299 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 [2024-09-20 19:51:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:51:35,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:51:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:51:35,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:51:35,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:51:35,382 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-09-20 19:51:35,382 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-09-20 19:51:35,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:51:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:51:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:51:35,435 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:51:35,437 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:51:35,549 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 19:51:35,550 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:51:35,572 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:51:35,572 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:51:35,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:35 BoogieIcfgContainer [2024-09-20 19:51:35,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:51:35,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:51:35,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:51:35,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:51:35,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:51:35" (1/3) ... [2024-09-20 19:51:35,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e265508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:35, skipping insertion in model container [2024-09-20 19:51:35,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:35" (2/3) ... [2024-09-20 19:51:35,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e265508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:35, skipping insertion in model container [2024-09-20 19:51:35,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:35" (3/3) ... [2024-09-20 19:51:35,581 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2024-09-20 19:51:35,592 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:51:35,593 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:51:35,644 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:51:35,649 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;@51a08006, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:51:35,649 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:51:35,652 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) [2024-09-20 19:51:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 19:51:35,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:35,657 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:35,658 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:35,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 661201948, now seen corresponding path program 1 times [2024-09-20 19:51:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154090304] [2024-09-20 19:51:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:35,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:35,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:51:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154090304] [2024-09-20 19:51:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154090304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:51:35,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:51:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:51:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798465939] [2024-09-20 19:51:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:51:35,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:51:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:51:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:51:35,929 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) [2024-09-20 19:51:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:35,984 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-20 19:51:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:51:35,986 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 [2024-09-20 19:51:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:35,991 INFO L225 Difference]: With dead ends: 30 [2024-09-20 19:51:35,991 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 19:51:35,993 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 [2024-09-20 19:51:35,995 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 [2024-09-20 19:51:35,996 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] [2024-09-20 19:51:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 19:51:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 19:51:36,019 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) [2024-09-20 19:51:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 19:51:36,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 19:51:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:36,022 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 19:51:36,022 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) [2024-09-20 19:51:36,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 19:51:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 19:51:36,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:36,024 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:36,024 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:51:36,024 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 36081636, now seen corresponding path program 1 times [2024-09-20 19:51:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:36,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459955660] [2024-09-20 19:51:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:51:36,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459955660] [2024-09-20 19:51:36,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459955660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622671151] [2024-09-20 19:51:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:36,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:36,219 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) [2024-09-20 19:51:36,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:51:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 19:51:36,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:51:36,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:51:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622671151] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:36,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-09-20 19:51:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759046587] [2024-09-20 19:51:36,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:36,468 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:51:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:51:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:51:36,469 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) [2024-09-20 19:51:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:36,531 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-20 19:51:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:51:36,532 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 [2024-09-20 19:51:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:36,533 INFO L225 Difference]: With dead ends: 25 [2024-09-20 19:51:36,533 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 19:51:36,533 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 [2024-09-20 19:51:36,534 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:36,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 19:51:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 19:51:36,539 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) [2024-09-20 19:51:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-20 19:51:36,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-20 19:51:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:36,540 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-20 19:51:36,540 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) [2024-09-20 19:51:36,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-20 19:51:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 19:51:36,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:36,541 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:36,555 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:36,742 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 [2024-09-20 19:51:36,742 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:36,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1588422884, now seen corresponding path program 2 times [2024-09-20 19:51:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170996958] [2024-09-20 19:51:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:36,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:51:36,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:36,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170996958] [2024-09-20 19:51:36,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170996958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:36,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527673081] [2024-09-20 19:51:36,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:36,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:36,913 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) [2024-09-20 19:51:36,915 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:51:36,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:36,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:36,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 19:51:36,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:51:36,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:51:37,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527673081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:37,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:37,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-09-20 19:51:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223138926] [2024-09-20 19:51:37,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:37,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:51:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:51:37,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:51:37,244 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) [2024-09-20 19:51:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:37,308 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 19:51:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:51:37,309 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 [2024-09-20 19:51:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:37,310 INFO L225 Difference]: With dead ends: 28 [2024-09-20 19:51:37,311 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 19:51:37,311 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 [2024-09-20 19:51:37,312 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:37,312 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 19:51:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 19:51:37,318 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) [2024-09-20 19:51:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 19:51:37,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-20 19:51:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:37,321 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 19:51:37,321 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) [2024-09-20 19:51:37,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 19:51:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:51:37,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:37,323 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:37,335 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:51:37,523 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 [2024-09-20 19:51:37,524 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:37,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1668608796, now seen corresponding path program 3 times [2024-09-20 19:51:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:37,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305382782] [2024-09-20 19:51:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:37,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:37,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305382782] [2024-09-20 19:51:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305382782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171938348] [2024-09-20 19:51:37,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:37,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:37,689 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) [2024-09-20 19:51:37,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:51:37,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:51:37,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:37,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:51:37,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:37,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:51:38,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171938348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:38,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:38,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-09-20 19:51:38,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643754853] [2024-09-20 19:51:38,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:38,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 19:51:38,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 19:51:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:51:38,195 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) [2024-09-20 19:51:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:38,266 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-20 19:51:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:51:38,267 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 [2024-09-20 19:51:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:38,267 INFO L225 Difference]: With dead ends: 31 [2024-09-20 19:51:38,268 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 19:51:38,268 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 [2024-09-20 19:51:38,269 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 [2024-09-20 19:51:38,269 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] [2024-09-20 19:51:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 19:51:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 19:51:38,274 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) [2024-09-20 19:51:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-20 19:51:38,275 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-20 19:51:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:38,275 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-20 19:51:38,275 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) [2024-09-20 19:51:38,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-20 19:51:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:51:38,278 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:38,281 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:38,481 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 [2024-09-20 19:51:38,482 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:38,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2054436324, now seen corresponding path program 4 times [2024-09-20 19:51:38,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:38,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753847290] [2024-09-20 19:51:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 19:51:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753847290] [2024-09-20 19:51:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753847290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934593259] [2024-09-20 19:51:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:38,695 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) [2024-09-20 19:51:38,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:51:38,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:38,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:51:38,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 19:51:38,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:51:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934593259] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:39,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:39,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-09-20 19:51:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692302314] [2024-09-20 19:51:39,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:39,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:51:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:51:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:51:39,320 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) [2024-09-20 19:51:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:39,373 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-20 19:51:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:51:39,374 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 [2024-09-20 19:51:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:39,374 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:51:39,374 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:51:39,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:51:39,375 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 [2024-09-20 19:51:39,376 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] [2024-09-20 19:51:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:51:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:51:39,381 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) [2024-09-20 19:51:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-20 19:51:39,382 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-20 19:51:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:39,382 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-20 19:51:39,384 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) [2024-09-20 19:51:39,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-20 19:51:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 19:51:39,386 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:39,386 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:39,398 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:39,589 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 [2024-09-20 19:51:39,590 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:39,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2043660772, now seen corresponding path program 5 times [2024-09-20 19:51:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:39,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13827360] [2024-09-20 19:51:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:51:39,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13827360] [2024-09-20 19:51:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13827360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939781177] [2024-09-20 19:51:39,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:51:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:39,846 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) [2024-09-20 19:51:39,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:51:39,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:51:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:39,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 19:51:39,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:51:39,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:40,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939781177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:40,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:40,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-09-20 19:51:40,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805141704] [2024-09-20 19:51:40,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:40,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:51:40,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:51:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:51:40,783 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) [2024-09-20 19:51:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:40,858 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-20 19:51:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:51:40,858 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 [2024-09-20 19:51:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:40,859 INFO L225 Difference]: With dead ends: 37 [2024-09-20 19:51:40,859 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 19:51:40,860 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:51:40,860 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:40,860 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 70 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 19:51:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 19:51:40,868 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) [2024-09-20 19:51:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 19:51:40,868 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-20 19:51:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:40,869 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 19:51:40,869 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) [2024-09-20 19:51:40,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 19:51:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:51:40,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:40,871 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:40,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:51:41,071 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 [2024-09-20 19:51:41,072 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:41,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 776256796, now seen corresponding path program 6 times [2024-09-20 19:51:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159240654] [2024-09-20 19:51:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 19:51:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:41,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159240654] [2024-09-20 19:51:41,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159240654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:41,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518783651] [2024-09-20 19:51:41,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:51:41,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:41,299 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) [2024-09-20 19:51:41,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:51:41,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 19:51:41,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:41,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 19:51:41,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 19:51:41,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 19:51:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518783651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:42,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-09-20 19:51:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844188607] [2024-09-20 19:51:42,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:42,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:51:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:51:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:51:42,544 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) [2024-09-20 19:51:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:42,622 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-20 19:51:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:51:42,623 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 [2024-09-20 19:51:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:42,623 INFO L225 Difference]: With dead ends: 40 [2024-09-20 19:51:42,624 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 19:51:42,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:51:42,625 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:42,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 19:51:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 19:51:42,629 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) [2024-09-20 19:51:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-20 19:51:42,630 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-20 19:51:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:42,630 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-20 19:51:42,630 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) [2024-09-20 19:51:42,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-20 19:51:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:51:42,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:42,631 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:42,831 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 [2024-09-20 19:51:42,832 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:42,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1513830684, now seen corresponding path program 7 times [2024-09-20 19:51:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:42,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836254826] [2024-09-20 19:51:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:42,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 19:51:43,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836254826] [2024-09-20 19:51:43,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836254826] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654343802] [2024-09-20 19:51:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:51:43,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:43,113 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) [2024-09-20 19:51:43,114 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:51:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:51:43,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 19:51:43,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:51:44,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654343802] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:44,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:44,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-09-20 19:51:44,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965419582] [2024-09-20 19:51:44,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:44,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:51:44,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:51:44,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:51:44,635 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) [2024-09-20 19:51:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:44,710 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-20 19:51:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:51:44,710 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 [2024-09-20 19:51:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:44,711 INFO L225 Difference]: With dead ends: 43 [2024-09-20 19:51:44,711 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 19:51:44,711 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 [2024-09-20 19:51:44,712 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:44,712 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 19:51:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 19:51:44,716 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) [2024-09-20 19:51:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-20 19:51:44,716 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-20 19:51:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:44,717 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-20 19:51:44,717 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) [2024-09-20 19:51:44,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-20 19:51:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 19:51:44,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:44,719 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:44,732 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:51:44,919 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 [2024-09-20 19:51:44,920 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:44,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 296579100, now seen corresponding path program 8 times [2024-09-20 19:51:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:44,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589987417] [2024-09-20 19:51:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:44,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:51:45,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:45,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589987417] [2024-09-20 19:51:45,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589987417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:45,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928305354] [2024-09-20 19:51:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:45,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:45,265 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) [2024-09-20 19:51:45,266 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:51:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:45,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:45,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 19:51:45,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:51:45,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:51:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928305354] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:47,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-09-20 19:51:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551462292] [2024-09-20 19:51:47,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:47,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 19:51:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 19:51:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:51:47,367 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) [2024-09-20 19:51:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:47,476 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-20 19:51:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:51:47,476 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 [2024-09-20 19:51:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:47,477 INFO L225 Difference]: With dead ends: 46 [2024-09-20 19:51:47,477 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 19:51:47,477 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:51:47,478 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 [2024-09-20 19:51:47,478 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] [2024-09-20 19:51:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 19:51:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 19:51:47,487 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) [2024-09-20 19:51:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-20 19:51:47,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-20 19:51:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:47,489 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-20 19:51:47,489 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) [2024-09-20 19:51:47,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-20 19:51:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 19:51:47,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:47,490 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:47,504 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:51:47,690 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 [2024-09-20 19:51:47,691 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:47,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1875246108, now seen corresponding path program 9 times [2024-09-20 19:51:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:47,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655415946] [2024-09-20 19:51:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:48,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:48,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:48,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:48,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 19:51:48,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:48,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655415946] [2024-09-20 19:51:48,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655415946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:48,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603805515] [2024-09-20 19:51:48,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:48,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:48,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:48,079 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) [2024-09-20 19:51:48,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:51:48,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 19:51:48,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:48,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 19:51:48,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 19:51:48,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:51:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603805515] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:50,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-09-20 19:51:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990002476] [2024-09-20 19:51:50,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:50,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 19:51:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 19:51:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:51:50,951 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) [2024-09-20 19:51:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:51,068 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-20 19:51:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:51:51,069 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 [2024-09-20 19:51:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:51,070 INFO L225 Difference]: With dead ends: 49 [2024-09-20 19:51:51,070 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 19:51:51,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:51:51,071 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 [2024-09-20 19:51:51,071 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] [2024-09-20 19:51:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 19:51:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 19:51:51,081 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) [2024-09-20 19:51:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-20 19:51:51,081 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-20 19:51:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:51,083 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-20 19:51:51,083 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) [2024-09-20 19:51:51,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-20 19:51:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 19:51:51,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:51,084 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:51,109 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:51,285 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 [2024-09-20 19:51:51,285 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:51,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1040850148, now seen corresponding path program 10 times [2024-09-20 19:51:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337662781] [2024-09-20 19:51:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:51,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 19:51:51,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:51,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337662781] [2024-09-20 19:51:51,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337662781] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:51,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623886031] [2024-09-20 19:51:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:51,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:51,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:51,745 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) [2024-09-20 19:51:51,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:51:51,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:51,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 19:51:51,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 19:51:51,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 19:51:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623886031] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:55,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-09-20 19:51:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418290639] [2024-09-20 19:51:55,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:55,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 19:51:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 19:51:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-09-20 19:51:55,551 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) [2024-09-20 19:51:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:55,682 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 19:51:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:51:55,683 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 [2024-09-20 19:51:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:55,684 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:51:55,684 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 19:51:55,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:51:55,685 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 [2024-09-20 19:51:55,685 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] [2024-09-20 19:51:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 19:51:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 19:51:55,692 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) [2024-09-20 19:51:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 19:51:55,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-20 19:51:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:55,693 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 19:51:55,693 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) [2024-09-20 19:51:55,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 19:51:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:51:55,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:55,694 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:55,706 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:55,894 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 [2024-09-20 19:51:55,895 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:55,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 218071268, now seen corresponding path program 11 times [2024-09-20 19:51:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034094463] [2024-09-20 19:51:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 19:51:56,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:56,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034094463] [2024-09-20 19:51:56,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034094463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:56,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337725174] [2024-09-20 19:51:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:51:56,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:56,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:56,442 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) [2024-09-20 19:51:56,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:51:56,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 19:51:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:56,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:51:56,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 19:51:56,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:52:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337725174] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:01,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-09-20 19:52:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110377873] [2024-09-20 19:52:01,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:01,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 19:52:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 19:52:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:52:01,177 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) [2024-09-20 19:52:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:01,292 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-20 19:52:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:52:01,292 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 [2024-09-20 19:52:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:01,293 INFO L225 Difference]: With dead ends: 55 [2024-09-20 19:52:01,293 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:52:01,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 19:52:01,294 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-20 19:52:01,294 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] [2024-09-20 19:52:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:52:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 19:52:01,297 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) [2024-09-20 19:52:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-20 19:52:01,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-20 19:52:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:01,298 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-20 19:52:01,298 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) [2024-09-20 19:52:01,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-20 19:52:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 19:52:01,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:01,299 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:01,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 19:52:01,503 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 [2024-09-20 19:52:01,503 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:01,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash -313649636, now seen corresponding path program 12 times [2024-09-20 19:52:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:01,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248844914] [2024-09-20 19:52:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:01,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:02,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:02,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:02,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:02,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 19:52:02,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248844914] [2024-09-20 19:52:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248844914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795513827] [2024-09-20 19:52:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:52:02,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:02,096 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) [2024-09-20 19:52:02,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:52:02,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 19:52:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:02,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:52:02,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 19:52:02,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 19:52:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795513827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:08,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:08,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-09-20 19:52:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161838239] [2024-09-20 19:52:08,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:08,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 19:52:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 19:52:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:52:08,105 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) [2024-09-20 19:52:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:08,246 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-20 19:52:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:52:08,246 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 [2024-09-20 19:52:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:08,247 INFO L225 Difference]: With dead ends: 58 [2024-09-20 19:52:08,247 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 19:52:08,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:52:08,248 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 [2024-09-20 19:52:08,248 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] [2024-09-20 19:52:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 19:52:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 19:52:08,253 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) [2024-09-20 19:52:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-20 19:52:08,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-20 19:52:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:08,254 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-20 19:52:08,254 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) [2024-09-20 19:52:08,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-20 19:52:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-20 19:52:08,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:08,255 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:08,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 19:52:08,459 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 [2024-09-20 19:52:08,459 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:08,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1407532516, now seen corresponding path program 13 times [2024-09-20 19:52:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121734263] [2024-09-20 19:52:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:08,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-20 19:52:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121734263] [2024-09-20 19:52:09,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121734263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214084588] [2024-09-20 19:52:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:52:09,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:09,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:09,099 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) [2024-09-20 19:52:09,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:52:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:09,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:52:09,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-20 19:52:09,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 19:52:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214084588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:16,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-09-20 19:52:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709959127] [2024-09-20 19:52:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:16,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 19:52:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 19:52:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 19:52:16,784 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) [2024-09-20 19:52:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:16,952 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-20 19:52:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:52:16,953 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 [2024-09-20 19:52:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:16,954 INFO L225 Difference]: With dead ends: 61 [2024-09-20 19:52:16,954 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 19:52:16,955 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 19:52:16,955 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 [2024-09-20 19:52:16,955 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] [2024-09-20 19:52:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 19:52:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 19:52:16,965 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) [2024-09-20 19:52:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 19:52:16,965 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-20 19:52:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:16,965 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 19:52:16,966 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) [2024-09-20 19:52:16,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 19:52:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 19:52:16,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:16,967 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:16,980 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:17,167 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 [2024-09-20 19:52:17,167 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:17,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1575356700, now seen corresponding path program 14 times [2024-09-20 19:52:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:17,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133792002] [2024-09-20 19:52:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:17,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-20 19:52:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133792002] [2024-09-20 19:52:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133792002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312175405] [2024-09-20 19:52:18,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:52:18,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:18,003 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) [2024-09-20 19:52:18,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:52:18,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:52:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:18,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 19:52:18,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-20 19:52:18,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 19:52:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312175405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:27,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:27,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-09-20 19:52:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391012431] [2024-09-20 19:52:27,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:27,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 19:52:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 19:52:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 19:52:27,609 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) [2024-09-20 19:52:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:27,774 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-20 19:52:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:52:27,775 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 [2024-09-20 19:52:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:27,775 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:52:27,776 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:52:27,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 19:52:27,777 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 [2024-09-20 19:52:27,777 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] [2024-09-20 19:52:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:52:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 19:52:27,780 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) [2024-09-20 19:52:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-20 19:52:27,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-20 19:52:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:27,781 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-20 19:52:27,781 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) [2024-09-20 19:52:27,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-20 19:52:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 19:52:27,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:27,782 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:27,796 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:52:27,983 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 [2024-09-20 19:52:27,983 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:27,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash 12270308, now seen corresponding path program 15 times [2024-09-20 19:52:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:27,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22691001] [2024-09-20 19:52:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:28,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22691001] [2024-09-20 19:52:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22691001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977711544] [2024-09-20 19:52:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:52:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:28,793 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) [2024-09-20 19:52:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:52:29,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 19:52:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:29,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 19:52:29,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:29,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 19:52:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977711544] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:40,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:40,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-09-20 19:52:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436559164] [2024-09-20 19:52:40,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:40,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 19:52:40,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 19:52:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:52:40,504 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) [2024-09-20 19:52:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:40,676 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-20 19:52:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 19:52:40,676 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 [2024-09-20 19:52:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:40,677 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:52:40,677 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:52:40,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 19:52:40,678 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 [2024-09-20 19:52:40,678 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] [2024-09-20 19:52:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:52:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 19:52:40,682 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) [2024-09-20 19:52:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-20 19:52:40,682 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-20 19:52:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:40,682 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-20 19:52:40,683 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) [2024-09-20 19:52:40,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-20 19:52:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 19:52:40,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:40,684 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:40,699 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:40,886 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 [2024-09-20 19:52:40,886 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:40,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash -101860324, now seen corresponding path program 16 times [2024-09-20 19:52:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565713913] [2024-09-20 19:52:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:40,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:40,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 19:52:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565713913] [2024-09-20 19:52:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565713913] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791701477] [2024-09-20 19:52:41,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:52:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:41,857 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) [2024-09-20 19:52:41,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:52:42,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:52:42,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:42,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:52:42,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 19:52:42,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 19:52:56,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791701477] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:56,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:56,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2024-09-20 19:52:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504201003] [2024-09-20 19:52:56,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:56,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 19:52:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 19:52:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 19:52:56,084 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) [2024-09-20 19:52:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:56,252 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-20 19:52:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:52:56,252 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 [2024-09-20 19:52:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:56,253 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:52:56,253 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 19:52:56,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=994, Invalid=2086, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 19:52:56,254 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 [2024-09-20 19:52:56,255 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] [2024-09-20 19:52:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 19:52:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-20 19:52:56,258 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) [2024-09-20 19:52:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-20 19:52:56,259 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-20 19:52:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:56,259 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-20 19:52:56,259 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) [2024-09-20 19:52:56,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-20 19:52:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 19:52:56,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:56,262 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:56,276 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:56,462 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 [2024-09-20 19:52:56,462 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:56,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash 324106212, now seen corresponding path program 17 times [2024-09-20 19:52:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:56,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494941839] [2024-09-20 19:52:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:56,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 19:52:57,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:57,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494941839] [2024-09-20 19:52:57,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494941839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:57,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683857056] [2024-09-20 19:52:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:52:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:57,501 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) [2024-09-20 19:52:57,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 19:52:58,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-20 19:52:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:58,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 19:52:58,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 19:52:58,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:53:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-20 19:53:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683857056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:53:14,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:53:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2024-09-20 19:53:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435044564] [2024-09-20 19:53:14,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:53:14,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 19:53:14,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:53:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 19:53:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 19:53:14,844 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) [2024-09-20 19:53:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:53:15,082 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-20 19:53:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:53:15,083 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 [2024-09-20 19:53:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:53:15,083 INFO L225 Difference]: With dead ends: 73 [2024-09-20 19:53:15,083 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:53:15,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 18 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2316, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 19:53:15,085 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 [2024-09-20 19:53:15,085 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] [2024-09-20 19:53:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:53:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 19:53:15,088 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) [2024-09-20 19:53:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-20 19:53:15,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-20 19:53:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:53:15,091 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-20 19:53:15,092 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) [2024-09-20 19:53:15,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-20 19:53:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 19:53:15,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:53:15,093 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:53:15,110 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 19:53:15,293 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 [2024-09-20 19:53:15,293 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:53:15,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1013633252, now seen corresponding path program 18 times [2024-09-20 19:53:15,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:53:15,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845450784] [2024-09-20 19:53:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:53:15,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:53:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:53:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:53:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:15,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:53:16,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:53:16,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845450784] [2024-09-20 19:53:16,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845450784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:16,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408123565] [2024-09-20 19:53:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:53:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:53:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:53:16,361 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) [2024-09-20 19:53:16,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 19:53:17,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 19:53:17,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:53:17,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:53:17,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:53:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:53:17,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:53:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 19:53:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408123565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:53:37,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:53:37,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 44 [2024-09-20 19:53:37,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76219264] [2024-09-20 19:53:37,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:53:37,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 19:53:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:53:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 19:53:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1406, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:53:37,163 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) [2024-09-20 19:53:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:53:37,316 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-20 19:53:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 19:53:37,317 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 [2024-09-20 19:53:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:53:37,317 INFO L225 Difference]: With dead ends: 76 [2024-09-20 19:53:37,317 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 19:53:37,318 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 19:53:37,319 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-20 19:53:37,319 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] [2024-09-20 19:53:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 19:53:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-20 19:53:37,322 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) [2024-09-20 19:53:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-20 19:53:37,322 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-20 19:53:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:53:37,323 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-20 19:53:37,323 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) [2024-09-20 19:53:37,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-20 19:53:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-20 19:53:37,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:53:37,324 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:53:37,340 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 19:53:37,526 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 [2024-09-20 19:53:37,526 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:53:37,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -277351196, now seen corresponding path program 19 times [2024-09-20 19:53:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:53:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447913199] [2024-09-20 19:53:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:53:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:53:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:37,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:53:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:37,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:53:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:37,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:37,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-20 19:53:38,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:53:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447913199] [2024-09-20 19:53:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447913199] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098645083] [2024-09-20 19:53:38,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:53:38,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:53:38,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:53:38,754 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) [2024-09-20 19:53:38,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 19:53:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:39,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 19:53:39,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:53:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-20 19:53:40,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:54:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-20 19:54:03,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098645083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:54:03,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:54:03,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 45 [2024-09-20 19:54:03,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665699514] [2024-09-20 19:54:03,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:54:03,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 19:54:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:54:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 19:54:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 19:54:03,530 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) [2024-09-20 19:54:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:54:03,726 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-20 19:54:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 19:54:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) Word has length 127 [2024-09-20 19:54:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:54:03,727 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:54:03,727 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 19:54:03,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 21 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1345, Invalid=2687, Unknown=0, NotChecked=0, Total=4032 [2024-09-20 19:54:03,729 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:54:03,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 195 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:54:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 19:54:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 19:54:03,733 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) [2024-09-20 19:54:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-20 19:54:03,733 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-20 19:54:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:54:03,733 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-20 19:54:03,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) [2024-09-20 19:54:03,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-20 19:54:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-20 19:54:03,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:54:03,735 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:54:03,753 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 19:54:03,935 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 [2024-09-20 19:54:03,935 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:54:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -653499876, now seen corresponding path program 20 times [2024-09-20 19:54:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:54:03,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511692636] [2024-09-20 19:54:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:54:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:54:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:04,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:54:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:04,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:54:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:05,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:05,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:05,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:06,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:06,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:06,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:07,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:08,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:08,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2024-09-20 19:54:08,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:54:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511692636] [2024-09-20 19:54:08,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511692636] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:54:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311554084] [2024-09-20 19:54:08,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:54:08,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:54:08,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:54:08,052 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) [2024-09-20 19:54:08,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 19:54:09,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:54:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:54:09,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-09-20 19:54:09,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:54:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-09-20 19:54:10,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:54:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-09-20 19:54:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311554084] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:54:16,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:54:16,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 49, 49] total 61 [2024-09-20 19:54:16,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171764158] [2024-09-20 19:54:16,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:54:16,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-20 19:54:16,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:54:16,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-20 19:54:16,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=3524, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 19:54:16,862 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 61 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 1 states have call predecessors, (8), 25 states have return successors, (26), 25 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-20 19:54:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:54:18,673 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2024-09-20 19:54:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 19:54:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 1 states have call predecessors, (8), 25 states have return successors, (26), 25 states have call predecessors, (26), 7 states have call successors, (26) Word has length 133 [2024-09-20 19:54:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:54:18,674 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:54:18,674 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:54:18,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=691, Invalid=10865, Unknown=0, NotChecked=0, Total=11556 [2024-09-20 19:54:18,677 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:54:18,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1215 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:54:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:54:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:54:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:54:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:54:18,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2024-09-20 19:54:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:54:18,678 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:54:18,678 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 1 states have call predecessors, (8), 25 states have return successors, (26), 25 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-20 19:54:18,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:54:18,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:54:18,680 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:54:18,699 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 19:54:18,881 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 [2024-09-20 19:54:18,884 INFO L408 BasicCegarLoop]: Path program histogram: [20, 1] [2024-09-20 19:54:18,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:54:19,505 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:54:19,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:54:19 BoogieIcfgContainer [2024-09-20 19:54:19,515 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:54:19,516 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:54:19,516 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:54:19,516 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:54:19,516 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:35" (3/4) ... [2024-09-20 19:54:19,517 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:54:19,557 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:54:19,557 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:54:19,558 INFO L158 Benchmark]: Toolchain (without parser) took 164499.98ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 107.8MB in the beginning and 496.0MB in the end (delta: -388.2MB). Peak memory consumption was 715.8MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,558 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory was 135.3MB in the beginning and 135.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:54:19,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.06ms. Allocated memory is still 176.2MB. Free memory was 107.6MB in the beginning and 96.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,561 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.18ms. Allocated memory is still 176.2MB. Free memory was 96.6MB in the beginning and 95.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:54:19,561 INFO L158 Benchmark]: Boogie Preprocessor took 23.72ms. Allocated memory is still 176.2MB. Free memory was 95.6MB in the beginning and 94.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,561 INFO L158 Benchmark]: RCFGBuilder took 299.01ms. Allocated memory is still 176.2MB. Free memory was 94.1MB in the beginning and 141.9MB in the end (delta: -47.7MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,561 INFO L158 Benchmark]: TraceAbstraction took 163941.36ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 140.6MB in the beginning and 498.1MB in the end (delta: -357.5MB). Peak memory consumption was 746.4MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,561 INFO L158 Benchmark]: Witness Printer took 41.45ms. Allocated memory is still 1.3GB. Free memory was 498.1MB in the beginning and 496.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:54:19,562 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 176.2MB. Free memory was 135.3MB in the beginning and 135.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.06ms. Allocated memory is still 176.2MB. Free memory was 107.6MB in the beginning and 96.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.18ms. Allocated memory is still 176.2MB. Free memory was 96.6MB in the beginning and 95.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.72ms. Allocated memory is still 176.2MB. Free memory was 95.6MB in the beginning and 94.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 299.01ms. Allocated memory is still 176.2MB. Free memory was 94.1MB in the beginning and 141.9MB in the end (delta: -47.7MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * TraceAbstraction took 163941.36ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 140.6MB in the beginning and 498.1MB in the end (delta: -357.5MB). Peak memory consumption was 746.4MB. Max. memory is 16.1GB. * Witness Printer took 41.45ms. Allocated memory is still 1.3GB. Free memory was 498.1MB in the beginning and 496.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 163.3s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2150 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1900 mSDsluCounter, 3606 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3335 mSDsCounter, 827 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4234 IncrementalHoareTripleChecker+Invalid, 5061 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 827 mSolverCounterUnsat, 271 mSDtfsCounter, 4234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4077 GetRequests, 3075 SyntacticMatches, 210 SemanticMatches, 792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13976 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 146.7s InterpolantComputationTime, 3053 NumberOfCodeBlocks, 3053 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 13567 SizeOfPredicates, 212 NumberOfNonLiveVariables, 4860 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 61 InterpolantComputations, 1 PerfectInterpolantSequences, 11291/26460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 5]: Procedure Contract for sum Derived contract for procedure sum. Ensures: (\result == ((long long) \old(n) + \old(m))) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:54:19,626 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE