./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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/id_i15_o15-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --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-f1d7dc9-m [2024-09-20 13:07:12,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:07:12,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:07:12,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:07:12,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:07:12,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:07:12,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:07:12,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:07:12,439 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:07:12,440 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:07:12,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:07:12,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:07:12,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:07:12,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:07:12,444 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:07:12,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:07:12,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:07:12,445 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:07:12,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:07:12,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:07:12,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:07:12,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:07:12,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:07:12,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:07:12,448 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:07:12,449 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:07:12,449 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:07:12,449 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:07:12,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:07:12,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:07:12,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:07:12,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:07:12,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:07:12,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:07:12,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:07:12,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:07:12,451 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:07:12,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:07:12,452 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:07:12,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:07:12,452 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:07:12,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:07:12,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:07:12,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:07:12,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:07:12,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:07:12,715 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:07:12,715 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:07:12,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-20 13:07:14,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:07:14,329 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:07:14,330 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-20 13:07:14,337 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c742b1999/30b64a80aced425782df02e2a752c10d/FLAG1d00f25aa [2024-09-20 13:07:14,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c742b1999/30b64a80aced425782df02e2a752c10d [2024-09-20 13:07:14,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:07:14,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:07:14,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:07:14,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:07:14,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:07:14,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:14,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34234c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14, skipping insertion in model container [2024-09-20 13:07:14,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:14,754 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:07:14,898 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/id_i15_o15-1.c[454,467] [2024-09-20 13:07:14,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:07:14,911 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:07:14,943 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/id_i15_o15-1.c[454,467] [2024-09-20 13:07:14,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:07:14,992 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:07:14,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14 WrapperNode [2024-09-20 13:07:14,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:07:14,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:07:14,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:07:14,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:07:15,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,016 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:07:15,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:07:15,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:07:15,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:07:15,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:07:15,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,039 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 13:07:15,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:07:15,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:07:15,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:07:15,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:07:15,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (1/1) ... [2024-09-20 13:07:15,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:07:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:15,084 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 13:07:15,086 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 13:07:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:07:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:07:15,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:07:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:07:15,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:07:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:07:15,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:07:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:07:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-20 13:07:15,135 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-20 13:07:15,199 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:07:15,201 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:07:15,333 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 13:07:15,333 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:07:15,357 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:07:15,359 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:07:15,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:15 BoogieIcfgContainer [2024-09-20 13:07:15,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:07:15,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:07:15,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:07:15,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:07:15,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:07:14" (1/3) ... [2024-09-20 13:07:15,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f83b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:15, skipping insertion in model container [2024-09-20 13:07:15,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:14" (2/3) ... [2024-09-20 13:07:15,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f83b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:15, skipping insertion in model container [2024-09-20 13:07:15,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:15" (3/3) ... [2024-09-20 13:07:15,369 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-20 13:07:15,386 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:07:15,386 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:07:15,434 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:07:15,441 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;@3643e4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:07:15,441 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:07:15,446 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 13:07:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 13:07:15,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:15,458 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:07:15,459 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:15,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-20 13:07:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836038130] [2024-09-20 13:07:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:15,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:15,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:15,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:15,742 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 13:07:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836038130] [2024-09-20 13:07:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836038130] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:07:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:07:15,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:07:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277365181] [2024-09-20 13:07:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:07:15,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:07:15,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:07:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:07:15,773 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 13:07:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:15,830 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-20 13:07:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:07:15,842 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 13:07:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:15,850 INFO L225 Difference]: With dead ends: 30 [2024-09-20 13:07:15,850 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 13:07:15,854 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 13:07:15,857 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:15,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 13:07:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 13:07:15,889 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 13:07:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 13:07:15,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 13:07:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:15,892 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 13:07:15,892 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 13:07:15,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 13:07:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 13:07:15,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:15,894 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 13:07:15,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:07:15,894 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-20 13:07:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753818743] [2024-09-20 13:07:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:15,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,148 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 13:07:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753818743] [2024-09-20 13:07:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753818743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874216163] [2024-09-20 13:07:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:16,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:16,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:16,152 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 13:07:16,154 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 13:07:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:07:16,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:16,313 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 13:07:16,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:16,572 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 13:07:16,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874216163] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:16,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:16,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-20 13:07:16,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036293378] [2024-09-20 13:07:16,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:16,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:07:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:07:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:07:16,579 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 13:07:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:16,662 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-20 13:07:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:07:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 19 [2024-09-20 13:07:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:16,665 INFO L225 Difference]: With dead ends: 25 [2024-09-20 13:07:16,665 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 13:07:16,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:07:16,667 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:16,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 13:07:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 13:07:16,679 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 13:07:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-20 13:07:16,680 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-20 13:07:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:16,680 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-20 13:07:16,681 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 13:07:16,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-20 13:07:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 13:07:16,684 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:16,685 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 13:07:16,709 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 13:07:16,885 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 13:07:16,886 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:16,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-20 13:07:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:16,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568180363] [2024-09-20 13:07:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:16,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:16,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:17,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:17,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:07:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568180363] [2024-09-20 13:07:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568180363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:17,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667979154] [2024-09-20 13:07:17,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:07:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:17,119 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 13:07:17,120 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 13:07:17,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:07:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:17,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:07:17,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:17,245 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 13:07:17,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:17,623 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 13:07:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667979154] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:17,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:17,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-20 13:07:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251510597] [2024-09-20 13:07:17,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:17,624 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:07:17,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:07:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:07:17,629 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-20 13:07:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:17,714 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 13:07:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:07:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) Word has length 25 [2024-09-20 13:07:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:17,716 INFO L225 Difference]: With dead ends: 28 [2024-09-20 13:07:17,717 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 13:07:17,718 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:07:17,719 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:17,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 13:07:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 13:07:17,730 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 13:07:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 13:07:17,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-20 13:07:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:17,731 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 13:07:17,731 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-20 13:07:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 13:07:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 13:07:17,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:17,733 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 13:07:17,750 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 13:07:17,938 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 13:07:17,939 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:17,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-20 13:07:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:17,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360028507] [2024-09-20 13:07:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:17,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:17,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:18,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:18,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:18,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:07:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360028507] [2024-09-20 13:07:18,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360028507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:18,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744412040] [2024-09-20 13:07:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:07:18,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:18,146 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 13:07:18,147 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 13:07:18,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 13:07:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:18,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:07:18,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:18,259 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 13:07:18,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:18,748 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 13:07:18,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744412040] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:18,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:18,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-20 13:07:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018669714] [2024-09-20 13:07:18,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:18,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:07:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:07:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:07:18,752 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 13:07:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:18,819 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-20 13:07:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:07:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) Word has length 31 [2024-09-20 13:07:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:18,821 INFO L225 Difference]: With dead ends: 31 [2024-09-20 13:07:18,821 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 13:07:18,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:07:18,822 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:18,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 13:07:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 13:07:18,831 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 13:07:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-20 13:07:18,833 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-20 13:07:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:18,834 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-20 13:07:18,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 13:07:18,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-20 13:07:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 13:07:18,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:18,840 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 13:07:18,857 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 13:07:19,044 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 13:07:19,045 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:19,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-20 13:07:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436573225] [2024-09-20 13:07:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 13:07:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436573225] [2024-09-20 13:07:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436573225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717443289] [2024-09-20 13:07:19,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:07:19,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:19,266 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 13:07:19,267 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 13:07:19,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:07:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:19,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 13:07:19,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:19,395 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 13:07:19,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:20,143 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 13:07:20,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717443289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:20,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:20,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-20 13:07:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101903166] [2024-09-20 13:07:20,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:20,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:07:20,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:07:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:07:20,145 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-20 13:07:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:20,219 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-20 13:07:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:07:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) Word has length 37 [2024-09-20 13:07:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:20,221 INFO L225 Difference]: With dead ends: 34 [2024-09-20 13:07:20,221 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 13:07:20,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:07:20,222 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:20,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 13:07:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 13:07:20,228 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 13:07:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-20 13:07:20,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-20 13:07:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:20,230 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-20 13:07:20,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-20 13:07:20,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-20 13:07:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 13:07:20,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:20,233 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 13:07:20,247 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:07:20,436 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 13:07:20,437 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:20,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-20 13:07:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:20,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613665125] [2024-09-20 13:07:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 13:07:20,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613665125] [2024-09-20 13:07:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613665125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452597048] [2024-09-20 13:07:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:07:20,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:20,737 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 13:07:20,739 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 13:07:20,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 13:07:20,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:20,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 13:07:20,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:20,874 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 13:07:20,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:21,950 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 13:07:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452597048] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:21,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-20 13:07:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997890139] [2024-09-20 13:07:21,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:21,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:07:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:07:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:07:21,953 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:07:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:22,033 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-20 13:07:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:07:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) Word has length 43 [2024-09-20 13:07:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:22,034 INFO L225 Difference]: With dead ends: 37 [2024-09-20 13:07:22,034 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 13:07:22,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:07:22,036 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:22,036 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 13:07:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 13:07:22,044 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 13:07:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 13:07:22,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-20 13:07:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:22,045 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 13:07:22,045 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:07:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 13:07:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 13:07:22,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:22,046 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 13:07:22,061 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 13:07:22,250 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 13:07:22,251 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:22,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-20 13:07:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237532923] [2024-09-20 13:07:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 13:07:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237532923] [2024-09-20 13:07:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237532923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956918582] [2024-09-20 13:07:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:07:22,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:22,583 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 13:07:22,585 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 13:07:22,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 13:07:22,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:22,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 13:07:22,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:22,737 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 13:07:22,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:24,086 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 13:07:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956918582] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:24,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-20 13:07:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424915194] [2024-09-20 13:07:24,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:24,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 13:07:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 13:07:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:07:24,088 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-20 13:07:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:24,166 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-20 13:07:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:07:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) Word has length 49 [2024-09-20 13:07:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:24,167 INFO L225 Difference]: With dead ends: 40 [2024-09-20 13:07:24,167 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 13:07:24,168 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:07:24,169 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:24,169 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 93 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 13:07:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 13:07:24,177 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 13:07:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-20 13:07:24,177 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-20 13:07:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:24,178 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-20 13:07:24,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-20 13:07:24,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-20 13:07:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 13:07:24,183 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:24,183 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 13:07:24,199 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 13:07:24,383 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 13:07:24,384 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:24,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-20 13:07:24,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:24,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743363018] [2024-09-20 13:07:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:24,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-20 13:07:24,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743363018] [2024-09-20 13:07:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743363018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087227708] [2024-09-20 13:07:24,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:07:24,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:24,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:24,739 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 13:07:24,741 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 13:07:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 13:07:24,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:24,902 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 13:07:24,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:26,597 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 13:07:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087227708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:26,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:26,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-20 13:07:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357720614] [2024-09-20 13:07:26,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:26,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:07:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:07:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:07:26,599 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 13:07:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:26,700 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-20 13:07:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 13:07:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) Word has length 55 [2024-09-20 13:07:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:26,702 INFO L225 Difference]: With dead ends: 43 [2024-09-20 13:07:26,702 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 13:07:26,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2024-09-20 13:07:26,703 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:26,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 13:07:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 13:07:26,709 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 13:07:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-20 13:07:26,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-20 13:07:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:26,710 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-20 13:07:26,710 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 13:07:26,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-20 13:07:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 13:07:26,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:26,712 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 13:07:26,728 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 13:07:26,912 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 13:07:26,912 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:26,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-20 13:07:26,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:26,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132425950] [2024-09-20 13:07:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:26,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 13:07:27,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:27,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132425950] [2024-09-20 13:07:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132425950] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770458023] [2024-09-20 13:07:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:07:27,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:27,322 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 13:07:27,323 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 13:07:27,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:07:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:27,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 13:07:27,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:27,525 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 13:07:27,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:29,915 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 13:07:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770458023] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:29,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-20 13:07:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563736671] [2024-09-20 13:07:29,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:29,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 13:07:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 13:07:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-20 13:07:29,918 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 13:07:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:30,018 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-20 13:07:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:07:30,019 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) Word has length 61 [2024-09-20 13:07:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:30,020 INFO L225 Difference]: With dead ends: 46 [2024-09-20 13:07:30,020 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 13:07:30,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 13:07:30,022 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:30,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 121 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 13:07:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 13:07:30,028 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 13:07:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-20 13:07:30,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-20 13:07:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:30,030 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-20 13:07:30,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 13:07:30,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-20 13:07:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 13:07:30,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:30,031 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 13:07:30,046 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 13:07:30,232 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 13:07:30,232 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:30,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:30,233 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-20 13:07:30,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:30,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470815517] [2024-09-20 13:07:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:30,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-20 13:07:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:30,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470815517] [2024-09-20 13:07:30,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470815517] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:30,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687911057] [2024-09-20 13:07:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:07:30,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:30,691 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 13:07:30,692 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 13:07:30,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 13:07:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:30,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 13:07:30,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:30,946 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 13:07:30,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:34,227 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 13:07:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687911057] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:34,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-20 13:07:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614616356] [2024-09-20 13:07:34,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:34,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 13:07:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 13:07:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:07:34,230 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-20 13:07:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:34,369 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-20 13:07:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:07:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) Word has length 67 [2024-09-20 13:07:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:34,373 INFO L225 Difference]: With dead ends: 49 [2024-09-20 13:07:34,373 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 13:07:34,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 13:07:34,374 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:34,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 13:07:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 13:07:34,383 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 13:07:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-20 13:07:34,385 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-20 13:07:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:34,385 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-20 13:07:34,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-20 13:07:34,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-20 13:07:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 13:07:34,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:34,387 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 13:07:34,404 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 13:07:34,590 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 13:07:34,591 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-20 13:07:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285351770] [2024-09-20 13:07:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 13:07:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285351770] [2024-09-20 13:07:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285351770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946699878] [2024-09-20 13:07:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:07:35,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:35,164 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 13:07:35,165 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 13:07:35,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:07:35,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:35,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 13:07:35,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:35,475 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 13:07:35,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:39,743 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 13:07:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946699878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:39,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:39,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-20 13:07:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003083967] [2024-09-20 13:07:39,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:39,744 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 13:07:39,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 13:07:39,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:07:39,746 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-20 13:07:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:39,874 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 13:07:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:07:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) Word has length 73 [2024-09-20 13:07:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:39,876 INFO L225 Difference]: With dead ends: 52 [2024-09-20 13:07:39,876 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 13:07:39,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 13:07:39,877 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:39,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 136 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 13:07:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 13:07:39,883 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 13:07:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 13:07:39,883 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-20 13:07:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:39,884 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 13:07:39,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-20 13:07:39,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 13:07:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 13:07:39,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:39,885 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 13:07:39,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 13:07:40,089 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 13:07:40,090 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:40,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-20 13:07:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154217449] [2024-09-20 13:07:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-20 13:07:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:40,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154217449] [2024-09-20 13:07:40,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154217449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:40,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763974860] [2024-09-20 13:07:40,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:07:40,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:40,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:40,825 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 13:07:40,826 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 13:07:41,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 13:07:41,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:41,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 13:07:41,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:41,235 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 13:07:41,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:46,865 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 13:07:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763974860] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:46,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-20 13:07:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904754987] [2024-09-20 13:07:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:46,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 13:07:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 13:07:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 13:07:46,869 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 13:07:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:47,000 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-20 13:07:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:07:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) Word has length 79 [2024-09-20 13:07:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:47,001 INFO L225 Difference]: With dead ends: 55 [2024-09-20 13:07:47,001 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 13:07:47,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1311, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 13:07:47,002 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:47,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 146 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 13:07:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 13:07:47,010 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 13:07:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-20 13:07:47,010 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-20 13:07:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:47,011 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-20 13:07:47,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 13:07:47,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-20 13:07:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 13:07:47,013 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:47,013 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 13:07:47,026 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:47,214 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 13:07:47,215 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:47,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-20 13:07:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013510694] [2024-09-20 13:07:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-20 13:07:47,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:47,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013510694] [2024-09-20 13:07:47,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013510694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:47,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110213778] [2024-09-20 13:07:47,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:07:47,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:47,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:47,990 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 13:07:47,995 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 13:07:48,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 13:07:48,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:48,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:07:48,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:48,447 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 13:07:48,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:55,560 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 13:07:55,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110213778] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:55,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:55,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-20 13:07:55,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118068203] [2024-09-20 13:07:55,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:55,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 13:07:55,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:55,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 13:07:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 13:07:55,564 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-20 13:07:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:55,725 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-20 13:07:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:07:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) Word has length 85 [2024-09-20 13:07:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:55,726 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:07:55,726 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:07:55,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=667, Invalid=1495, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:07:55,727 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:55,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:07:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 13:07:55,736 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 13:07:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-20 13:07:55,737 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-20 13:07:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:55,737 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-20 13:07:55,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-20 13:07:55,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-20 13:07:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-20 13:07:55,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:55,739 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 13:07:55,754 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:55,943 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 13:07:55,943 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:55,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-20 13:07:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818952826] [2024-09-20 13:07:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-20 13:07:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818952826] [2024-09-20 13:07:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818952826] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633418050] [2024-09-20 13:07:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:07:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:56,791 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 13:07:56,793 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 13:07:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:57,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 13:07:57,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:57,303 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 13:07:57,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:06,361 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 13:08:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633418050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:06,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:06,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-20 13:08:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218990281] [2024-09-20 13:08:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:06,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 13:08:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 13:08:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:08:06,363 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-20 13:08:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:06,523 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-20 13:08:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 13:08:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) Word has length 91 [2024-09-20 13:08:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:06,525 INFO L225 Difference]: With dead ends: 61 [2024-09-20 13:08:06,525 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:08:06,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1691, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 13:08:06,526 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:06,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 165 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:08:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 13:08:06,532 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 13:08:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 13:08:06,533 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-20 13:08:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:06,533 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 13:08:06,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-20 13:08:06,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 13:08:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 13:08:06,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:06,534 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 13:08:06,548 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 13:08:06,735 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 13:08:06,735 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:06,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-20 13:08:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484033938] [2024-09-20 13:08:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:06,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:06,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:06,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-20 13:08:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484033938] [2024-09-20 13:08:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484033938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361521788] [2024-09-20 13:08:07,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:08:07,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:07,633 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 13:08:07,634 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 13:08:08,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:08:08,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:08,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 13:08:08,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:08,248 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 13:08:08,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:19,347 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 13:08:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361521788] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:19,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:19,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-20 13:08:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658869498] [2024-09-20 13:08:19,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:19,348 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 13:08:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 13:08:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 13:08:19,349 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 13:08:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:19,531 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-20 13:08:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:08:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-20 13:08:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:19,533 INFO L225 Difference]: With dead ends: 64 [2024-09-20 13:08:19,533 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 13:08:19,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 13:08:19,534 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:19,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 180 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 13:08:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 13:08:19,545 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 13:08:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-20 13:08:19,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-20 13:08:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:19,547 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-20 13:08:19,547 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 13:08:19,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-20 13:08:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 13:08:19,549 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:19,549 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 13:08:19,569 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 13:08:19,749 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 13:08:19,750 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:19,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-20 13:08:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:19,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479802630] [2024-09-20 13:08:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:19,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:19,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:20,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-20 13:08:21,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:21,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479802630] [2024-09-20 13:08:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479802630] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:21,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9897187] [2024-09-20 13:08:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:08:21,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:21,239 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 13:08:21,241 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 13:08:21,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 13:08:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:21,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 13:08:21,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:22,057 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 13:08:22,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:22,841 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 13:08:22,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9897187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:22,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:22,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-20 13:08:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132805774] [2024-09-20 13:08:22,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:22,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 13:08:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 13:08:22,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:08:22,844 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-20 13:08:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:23,726 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-20 13:08:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 13:08:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) Word has length 103 [2024-09-20 13:08:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:23,727 INFO L225 Difference]: With dead ends: 67 [2024-09-20 13:08:23,728 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 13:08:23,729 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 13:08:23,730 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:23,730 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 828 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:08:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 13:08:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 13:08:23,736 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 13:08:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-20 13:08:23,737 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-20 13:08:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:23,737 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-20 13:08:23,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-20 13:08:23,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-20 13:08:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 13:08:23,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:23,739 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 13:08:23,759 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 13:08:23,939 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 13:08:23,939 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:23,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:23,940 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-20 13:08:23,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:23,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292282357] [2024-09-20 13:08:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:24,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:25,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:25,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:25,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-20 13:08:25,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:25,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292282357] [2024-09-20 13:08:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292282357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:25,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698168339] [2024-09-20 13:08:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:08:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:25,108 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 13:08:25,110 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 13:08:25,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:08:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:25,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 13:08:25,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 13:08:26,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:08:26,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698168339] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:08:26,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:08:26,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-20 13:08:26,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739321681] [2024-09-20 13:08:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:08:26,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:08:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:08:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:08:26,019 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-20 13:08:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:26,234 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-20 13:08:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:08:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2024-09-20 13:08:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:26,235 INFO L225 Difference]: With dead ends: 63 [2024-09-20 13:08:26,235 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:08:26,236 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 13:08:26,236 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:26,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 175 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:08:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:08:26,237 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 13:08:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:08:26,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-20 13:08:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:26,237 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:08:26,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-20 13:08:26,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:08:26,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:08:26,240 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 13:08:26,254 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 13:08:26,440 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 13:08:26,443 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-20 13:08:26,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 13:08:27,569 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:08:27,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:08:27 BoogieIcfgContainer [2024-09-20 13:08:27,603 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:08:27,603 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 13:08:27,603 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 13:08:27,604 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 13:08:27,604 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:15" (3/4) ... [2024-09-20 13:08:27,606 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 13:08:27,655 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 13:08:27,655 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 13:08:27,656 INFO L158 Benchmark]: Toolchain (without parser) took 72929.95ms. Allocated memory was 163.6MB in the beginning and 597.7MB in the end (delta: 434.1MB). Free memory was 97.9MB in the beginning and 315.1MB in the end (delta: -217.2MB). Peak memory consumption was 217.3MB. Max. memory is 16.1GB. [2024-09-20 13:08:27,656 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:08:27,656 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.16ms. Allocated memory is still 163.6MB. Free memory was 97.9MB in the beginning and 132.6MB in the end (delta: -34.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 13:08:27,656 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.26ms. Allocated memory is still 163.6MB. Free memory was 132.6MB in the beginning and 131.8MB in the end (delta: 830.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:08:27,656 INFO L158 Benchmark]: Boogie Preprocessor took 32.43ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 129.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:08:27,657 INFO L158 Benchmark]: RCFGBuilder took 309.57ms. Allocated memory is still 163.6MB. Free memory was 129.7MB in the beginning and 117.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 13:08:27,657 INFO L158 Benchmark]: TraceAbstraction took 72240.78ms. Allocated memory was 163.6MB in the beginning and 597.7MB in the end (delta: 434.1MB). Free memory was 117.1MB in the beginning and 317.2MB in the end (delta: -200.1MB). Peak memory consumption was 352.0MB. Max. memory is 16.1GB. [2024-09-20 13:08:27,657 INFO L158 Benchmark]: Witness Printer took 51.76ms. Allocated memory is still 597.7MB. Free memory was 317.2MB in the beginning and 315.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:08:27,658 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.16ms. Allocated memory is still 163.6MB. Free memory was 97.9MB in the beginning and 132.6MB in the end (delta: -34.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.26ms. Allocated memory is still 163.6MB. Free memory was 132.6MB in the beginning and 131.8MB in the end (delta: 830.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.43ms. Allocated memory is still 163.6MB. Free memory was 131.8MB in the beginning and 129.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 309.57ms. Allocated memory is still 163.6MB. Free memory was 129.7MB in the beginning and 117.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 72240.78ms. Allocated memory was 163.6MB in the beginning and 597.7MB in the end (delta: 434.1MB). Free memory was 117.1MB in the beginning and 317.2MB in the end (delta: -200.1MB). Peak memory consumption was 352.0MB. Max. memory is 16.1GB. * Witness Printer took 51.76ms. Allocated memory is still 597.7MB. Free memory was 317.2MB in the beginning and 315.1MB 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: 15]: 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: 71.0s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 954 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 786 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2429 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2419 IncrementalHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 264 mSDtfsCounter, 2419 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2634 GetRequests, 1967 SyntacticMatches, 120 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, InterpolantAutomatonStates: 237, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 60.3s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2928 ConstructedInterpolants, 0 QuantifiedInterpolants, 8018 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2688 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 6160/13088 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: 6]: Procedure Contract for id Derived contract for procedure id. Ensures: ((((((((((((((((((3 == \result) && (\old(x) == 3)) || (15 < \old(x))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((2 == \result) && (\old(x) == 2))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\result == 0) && (\old(x) == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-20 13:08:27,691 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE