./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:28:11,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:28:11,621 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:28:11,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:28:11,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:28:11,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:28:11,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:28:11,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:28:11,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:28:11,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:28:11,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:28:11,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:28:11,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:28:11,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:28:11,655 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:28:11,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:28:11,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:28:11,655 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:28:11,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:28:11,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:28:11,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:28:11,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:28:11,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:28:11,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:28:11,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:28:11,658 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:28:11,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:28:11,659 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:28:11,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:28:11,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:28:11,659 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:28:11,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:28:11,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:28:11,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:28:11,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:28:11,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:28:11,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:28:11,662 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:28:11,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:28:11,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:28:11,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:28:11,939 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:28:11,939 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:28:11,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-25 11:28:13,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:28:13,291 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:28:13,291 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-25 11:28:13,297 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e096f41d1/43f1f645874842f48c9ec4d28b07c895/FLAGea38b3bca [2024-09-25 11:28:13,692 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e096f41d1/43f1f645874842f48c9ec4d28b07c895 [2024-09-25 11:28:13,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:28:13,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:28:13,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:28:13,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:28:13,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:28:13,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f067b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13, skipping insertion in model container [2024-09-25 11:28:13,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,711 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:28:13,810 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] [2024-09-25 11:28:13,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:28:13,828 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:28:13,841 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] [2024-09-25 11:28:13,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:28:13,853 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:28:13,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13 WrapperNode [2024-09-25 11:28:13,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:28:13,854 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:28:13,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:28:13,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:28:13,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,867 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:28:13,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:28:13,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:28:13,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:28:13,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:28:13,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,876 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,884 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-25 11:28:13,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:28:13,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:28:13,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:28:13,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:28:13,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (1/1) ... [2024-09-25 11:28:13,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:28:13,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:13,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:28:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:28:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:28:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:28:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:28:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:28:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:28:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:28:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-25 11:28:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-25 11:28:14,017 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:28:14,019 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:28:14,154 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 11:28:14,154 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:28:14,172 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:28:14,172 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 11:28:14,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:14 BoogieIcfgContainer [2024-09-25 11:28:14,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:28:14,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:28:14,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:28:14,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:28:14,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:28:13" (1/3) ... [2024-09-25 11:28:14,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a859aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:28:14, skipping insertion in model container [2024-09-25 11:28:14,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:28:13" (2/3) ... [2024-09-25 11:28:14,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a859aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:28:14, skipping insertion in model container [2024-09-25 11:28:14,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:14" (3/3) ... [2024-09-25 11:28:14,181 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-25 11:28:14,193 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:28:14,193 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:28:14,236 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:28:14,242 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;@154020f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:28:14,242 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:28:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 11:28:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 11:28:14,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:14,251 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:14,251 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:14,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-25 11:28:14,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:14,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002023913] [2024-09-25 11:28:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:14,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:28:14,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:14,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002023913] [2024-09-25 11:28:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002023913] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:28:14,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:28:14,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:28:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113950399] [2024-09-25 11:28:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:28:14,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:28:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:28:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:28:14,519 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 11:28:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:14,581 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-25 11:28:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:28:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-25 11:28:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:14,588 INFO L225 Difference]: With dead ends: 30 [2024-09-25 11:28:14,588 INFO L226 Difference]: Without dead ends: 18 [2024-09-25 11:28:14,590 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:28:14,592 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 [2024-09-25 11:28:14,593 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] [2024-09-25 11:28:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-25 11:28:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-25 11:28:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 11:28:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-25 11:28:14,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-25 11:28:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:14,623 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-25 11:28:14,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 11:28:14,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-25 11:28:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 11:28:14,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:14,625 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:14,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:28:14,625 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:14,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-25 11:28:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:14,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671491684] [2024-09-25 11:28:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:28:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671491684] [2024-09-25 11:28:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671491684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867767842] [2024-09-25 11:28:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:14,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:14,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:14,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:28:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:14,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 11:28:14,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:28:14,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:28:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867767842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:15,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:15,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-25 11:28:15,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756638944] [2024-09-25 11:28:15,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:15,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 11:28:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:15,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 11:28:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-25 11:28:15,163 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) [2024-09-25 11:28:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:15,216 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-25 11:28:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 11:28:15,218 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 [2024-09-25 11:28:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:15,218 INFO L225 Difference]: With dead ends: 25 [2024-09-25 11:28:15,218 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 11:28:15,219 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 [2024-09-25 11:28:15,220 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 [2024-09-25 11:28:15,220 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] [2024-09-25 11:28:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 11:28:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-25 11:28:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 11:28:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-25 11:28:15,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-25 11:28:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:15,229 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-25 11:28:15,229 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) [2024-09-25 11:28:15,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-25 11:28:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 11:28:15,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:15,231 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:15,243 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:15,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:15,435 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:15,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-25 11:28:15,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:15,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137876730] [2024-09-25 11:28:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:15,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:15,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:15,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:15,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 11:28:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137876730] [2024-09-25 11:28:15,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137876730] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751643597] [2024-09-25 11:28:15,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:28:15,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:15,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:15,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:15,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:28:15,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:28:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:15,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 11:28:15,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 11:28:15,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 11:28:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751643597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:15,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-25 11:28:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088668952] [2024-09-25 11:28:15,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:15,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:28:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:28:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:28:15,984 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) [2024-09-25 11:28:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:16,040 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-25 11:28:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 11:28:16,041 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 [2024-09-25 11:28:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:16,042 INFO L225 Difference]: With dead ends: 28 [2024-09-25 11:28:16,042 INFO L226 Difference]: Without dead ends: 24 [2024-09-25 11:28:16,042 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 [2024-09-25 11:28:16,043 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:16,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:28:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-25 11:28:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-25 11:28:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 11:28:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-25 11:28:16,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-25 11:28:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:16,049 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-25 11:28:16,049 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) [2024-09-25 11:28:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-25 11:28:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 11:28:16,054 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:16,054 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:16,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:16,258 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:16,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-25 11:28:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:16,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62404786] [2024-09-25 11:28:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:28:16,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62404786] [2024-09-25 11:28:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62404786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730217802] [2024-09-25 11:28:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:28:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:16,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:16,422 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:28:16,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 11:28:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:16,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 11:28:16,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:28:16,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:28:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730217802] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:16,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:16,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-25 11:28:16,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462593315] [2024-09-25 11:28:16,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:16,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 11:28:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 11:28:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:28:16,888 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) [2024-09-25 11:28:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:16,947 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-25 11:28:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:28:16,947 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 [2024-09-25 11:28:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:16,948 INFO L225 Difference]: With dead ends: 31 [2024-09-25 11:28:16,948 INFO L226 Difference]: Without dead ends: 27 [2024-09-25 11:28:16,949 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:28:16,949 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 [2024-09-25 11:28:16,950 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] [2024-09-25 11:28:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-25 11:28:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-25 11:28:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 11:28:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-25 11:28:16,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-25 11:28:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:16,956 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-25 11:28:16,956 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) [2024-09-25 11:28:16,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-25 11:28:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 11:28:16,961 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:16,964 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:16,977 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 11:28:17,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:17,169 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:17,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-25 11:28:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449463129] [2024-09-25 11:28:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 11:28:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449463129] [2024-09-25 11:28:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449463129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651887809] [2024-09-25 11:28:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:28:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:17,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:17,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:28:17,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:28:17,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:17,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 11:28:17,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 11:28:17,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:28:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651887809] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:18,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:18,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-25 11:28:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654135472] [2024-09-25 11:28:18,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:18,032 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 11:28:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 11:28:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:28:18,033 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) [2024-09-25 11:28:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:18,097 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-25 11:28:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 11:28:18,097 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 [2024-09-25 11:28:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:18,098 INFO L225 Difference]: With dead ends: 34 [2024-09-25 11:28:18,098 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 11:28:18,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:28:18,099 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 [2024-09-25 11:28:18,099 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] [2024-09-25 11:28:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 11:28:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-25 11:28:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 11:28:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-25 11:28:18,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-25 11:28:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:18,105 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-25 11:28:18,105 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) [2024-09-25 11:28:18,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-25 11:28:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 11:28:18,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:18,106 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:18,120 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:18,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:18,308 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:18,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-25 11:28:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803652785] [2024-09-25 11:28:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-25 11:28:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803652785] [2024-09-25 11:28:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803652785] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810842326] [2024-09-25 11:28:18,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:28:18,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:18,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:18,497 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:28:18,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 11:28:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:18,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 11:28:18,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 11:28:18,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 11:28:19,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810842326] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:19,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:19,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-25 11:28:19,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169255422] [2024-09-25 11:28:19,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:19,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:28:19,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:28:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:28:19,410 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) [2024-09-25 11:28:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:19,470 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-25 11:28:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:28:19,470 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 [2024-09-25 11:28:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:19,471 INFO L225 Difference]: With dead ends: 37 [2024-09-25 11:28:19,471 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 11:28:19,471 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 [2024-09-25 11:28:19,472 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 [2024-09-25 11:28:19,472 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] [2024-09-25 11:28:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 11:28:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 11:28:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 11:28:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-25 11:28:19,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-25 11:28:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:19,478 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-25 11:28:19,478 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) [2024-09-25 11:28:19,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-25 11:28:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 11:28:19,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:19,479 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:19,491 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:19,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 11:28:19,680 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:19,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-25 11:28:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:19,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284000026] [2024-09-25 11:28:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:19,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-25 11:28:19,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:19,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284000026] [2024-09-25 11:28:19,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284000026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:19,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385257782] [2024-09-25 11:28:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 11:28:19,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:19,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:19,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:28:19,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 11:28:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:19,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 11:28:19,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-25 11:28:20,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 11:28:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385257782] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:21,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-25 11:28:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461242169] [2024-09-25 11:28:21,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:21,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:28:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:28:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:28:21,051 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) [2024-09-25 11:28:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:21,120 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-25 11:28:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 11:28:21,121 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 [2024-09-25 11:28:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:21,121 INFO L225 Difference]: With dead ends: 40 [2024-09-25 11:28:21,121 INFO L226 Difference]: Without dead ends: 36 [2024-09-25 11:28:21,122 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 [2024-09-25 11:28:21,122 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 [2024-09-25 11:28:21,122 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] [2024-09-25 11:28:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-25 11:28:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-25 11:28:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-25 11:28:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-25 11:28:21,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-25 11:28:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:21,133 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-25 11:28:21,133 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) [2024-09-25 11:28:21,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-25 11:28:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 11:28:21,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:21,134 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:21,150 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:21,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:21,335 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:21,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-25 11:28:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961121690] [2024-09-25 11:28:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-25 11:28:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:21,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961121690] [2024-09-25 11:28:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961121690] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:21,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347407605] [2024-09-25 11:28:21,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 11:28:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:21,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:21,610 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:28:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:21,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 11:28:21,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 11:28:21,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 11:28:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347407605] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:23,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-25 11:28:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751176119] [2024-09-25 11:28:23,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:23,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 11:28:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 11:28:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:28:23,110 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) [2024-09-25 11:28:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:23,196 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-25 11:28:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:28:23,196 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 [2024-09-25 11:28:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:23,197 INFO L225 Difference]: With dead ends: 43 [2024-09-25 11:28:23,197 INFO L226 Difference]: Without dead ends: 39 [2024-09-25 11:28:23,198 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 [2024-09-25 11:28:23,198 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:23,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:28:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-25 11:28:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-25 11:28:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 11:28:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-25 11:28:23,204 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-25 11:28:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:23,204 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-25 11:28:23,204 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) [2024-09-25 11:28:23,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-25 11:28:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-25 11:28:23,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:23,205 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:23,218 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:23,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:23,410 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:23,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-25 11:28:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465778996] [2024-09-25 11:28:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-25 11:28:23,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465778996] [2024-09-25 11:28:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465778996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:23,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542680145] [2024-09-25 11:28:23,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:28:23,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:23,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:23,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:23,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:28:23,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:28:23,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:23,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 11:28:23,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-25 11:28:23,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 11:28:25,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542680145] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:25,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:25,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-25 11:28:25,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794638523] [2024-09-25 11:28:25,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:25,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:28:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:28:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-25 11:28:25,789 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) [2024-09-25 11:28:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:25,875 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-25 11:28:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 11:28:25,876 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 [2024-09-25 11:28:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:25,879 INFO L225 Difference]: With dead ends: 46 [2024-09-25 11:28:25,879 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 11:28:25,879 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:28:25,880 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:25,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 121 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:28:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 11:28:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-25 11:28:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 11:28:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-25 11:28:25,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-25 11:28:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:25,885 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-25 11:28:25,885 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) [2024-09-25 11:28:25,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-25 11:28:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-25 11:28:25,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:25,888 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:25,901 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 11:28:26,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:26,089 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:26,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-25 11:28:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254550093] [2024-09-25 11:28:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-25 11:28:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254550093] [2024-09-25 11:28:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254550093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:26,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790661392] [2024-09-25 11:28:26,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:28:26,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:26,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:26,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:26,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:28:26,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 11:28:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:26,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 11:28:26,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 11:28:26,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 11:28:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790661392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:29,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:29,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-25 11:28:29,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490932557] [2024-09-25 11:28:29,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:29,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 11:28:29,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 11:28:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-25 11:28:29,303 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) [2024-09-25 11:28:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:29,407 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-25 11:28:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:28:29,408 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 [2024-09-25 11:28:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:29,410 INFO L225 Difference]: With dead ends: 49 [2024-09-25 11:28:29,410 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 11:28:29,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:28:29,411 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:28:29,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:28:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 11:28:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 11:28:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 11:28:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-25 11:28:29,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-25 11:28:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:29,420 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-25 11:28:29,421 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) [2024-09-25 11:28:29,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-25 11:28:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 11:28:29,425 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:29,425 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:29,437 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 11:28:29,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 11:28:29,629 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:29,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-25 11:28:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92048018] [2024-09-25 11:28:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:29,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:29,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:30,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-25 11:28:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92048018] [2024-09-25 11:28:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92048018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864872847] [2024-09-25 11:28:30,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:28:30,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:30,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:28:30,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:28:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:30,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 11:28:30,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-25 11:28:30,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 11:28:33,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864872847] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:33,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:33,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-25 11:28:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411468813] [2024-09-25 11:28:33,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:33,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 11:28:33,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 11:28:33,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-25 11:28:33,674 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) [2024-09-25 11:28:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:33,781 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-25 11:28:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:28:33,782 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 [2024-09-25 11:28:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:33,783 INFO L225 Difference]: With dead ends: 52 [2024-09-25 11:28:33,783 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 11:28:33,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:28:33,784 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 [2024-09-25 11:28:33,784 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] [2024-09-25 11:28:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 11:28:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-25 11:28:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 11:28:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-25 11:28:33,790 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-25 11:28:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:33,790 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-25 11:28:33,790 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) [2024-09-25 11:28:33,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-25 11:28:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-25 11:28:33,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:33,791 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:33,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 11:28:33,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 11:28:33,991 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-25 11:28:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:33,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58698639] [2024-09-25 11:28:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-25 11:28:34,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:34,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58698639] [2024-09-25 11:28:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58698639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:34,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368316628] [2024-09-25 11:28:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:28:34,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:34,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:34,482 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 11:28:34,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 11:28:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:34,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 11:28:34,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-25 11:28:34,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 11:28:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368316628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:39,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-25 11:28:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683315863] [2024-09-25 11:28:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:39,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 11:28:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 11:28:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 11:28:39,149 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) [2024-09-25 11:28:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:39,270 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-25 11:28:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:28:39,271 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 [2024-09-25 11:28:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:39,271 INFO L225 Difference]: With dead ends: 55 [2024-09-25 11:28:39,271 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 11:28:39,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=1311, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 11:28:39,272 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 [2024-09-25 11:28:39,272 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] [2024-09-25 11:28:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 11:28:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-25 11:28:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-25 11:28:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-25 11:28:39,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-25 11:28:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:39,278 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-25 11:28:39,278 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) [2024-09-25 11:28:39,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-25 11:28:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 11:28:39,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:39,279 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:39,291 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 11:28:39,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:39,480 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:39,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-25 11:28:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:39,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811704288] [2024-09-25 11:28:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:39,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:39,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:40,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:40,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:40,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 11:28:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811704288] [2024-09-25 11:28:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811704288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:40,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759936269] [2024-09-25 11:28:40,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 11:28:40,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:40,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:40,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:40,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 11:28:40,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 11:28:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:40,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 11:28:40,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-25 11:28:40,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 11:28:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759936269] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:45,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:45,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-25 11:28:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022548964] [2024-09-25 11:28:45,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:45,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 11:28:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 11:28:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 11:28:45,974 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) [2024-09-25 11:28:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:46,108 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-25 11:28:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 11:28:46,109 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 [2024-09-25 11:28:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:46,111 INFO L225 Difference]: With dead ends: 58 [2024-09-25 11:28:46,111 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 11:28:46,112 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 [2024-09-25 11:28:46,112 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-25 11:28:46,113 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] [2024-09-25 11:28:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 11:28:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 11:28:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 11:28:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-25 11:28:46,119 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-25 11:28:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:46,119 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-25 11:28:46,119 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) [2024-09-25 11:28:46,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-25 11:28:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-25 11:28:46,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:46,121 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:46,133 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 11:28:46,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 11:28:46,321 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:46,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-25 11:28:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72798356] [2024-09-25 11:28:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-25 11:28:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:46,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72798356] [2024-09-25 11:28:46,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72798356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:46,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723509830] [2024-09-25 11:28:46,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 11:28:46,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:46,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:46,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 11:28:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:47,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 11:28:47,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-25 11:28:47,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:28:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 11:28:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723509830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:28:54,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:28:54,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-25 11:28:54,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702070384] [2024-09-25 11:28:54,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:28:54,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 11:28:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:28:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 11:28:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 11:28:54,502 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) [2024-09-25 11:28:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:28:54,650 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-25 11:28:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 11:28:54,651 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 [2024-09-25 11:28:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:28:54,652 INFO L225 Difference]: With dead ends: 61 [2024-09-25 11:28:54,652 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 11:28:54,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1691, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 11:28:54,653 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-25 11:28:54,653 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] [2024-09-25 11:28:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 11:28:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-25 11:28:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-25 11:28:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-25 11:28:54,657 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-25 11:28:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:28:54,658 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-25 11:28:54,658 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) [2024-09-25 11:28:54,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-25 11:28:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-25 11:28:54,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:28:54,659 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:28:54,673 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 11:28:54,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 11:28:54,862 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:28:54,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:28:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-25 11:28:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:28:54,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89357564] [2024-09-25 11:28:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:28:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:28:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:54,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:28:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:54,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:28:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:28:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:28:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-25 11:28:55,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:28:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89357564] [2024-09-25 11:28:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89357564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:28:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321906643] [2024-09-25 11:28:55,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:28:55,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:28:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:28:55,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:28:55,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 11:28:55,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:28:55,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:28:55,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 11:28:55,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:28:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-25 11:28:56,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:29:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 11:29:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321906643] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:29:04,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:29:04,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-25 11:29:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561606470] [2024-09-25 11:29:04,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:29:04,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 11:29:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 11:29:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:29:04,808 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) [2024-09-25 11:29:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:29:04,954 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-25 11:29:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 11:29:04,955 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 [2024-09-25 11:29:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:29:04,956 INFO L225 Difference]: With dead ends: 64 [2024-09-25 11:29:04,956 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 11:29:04,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 11:29:04,957 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-25 11:29:04,957 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] [2024-09-25 11:29:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 11:29:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-25 11:29:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-25 11:29:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-25 11:29:04,961 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-25 11:29:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:29:04,962 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-25 11:29:04,962 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) [2024-09-25 11:29:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-25 11:29:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-25 11:29:04,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:29:04,963 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:29:04,977 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 11:29:05,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 11:29:05,163 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:29:05,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-25 11:29:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:29:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154051618] [2024-09-25 11:29:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:29:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:29:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:29:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:05,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:06,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:06,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:06,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:06,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-25 11:29:06,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:29:06,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154051618] [2024-09-25 11:29:06,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154051618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:29:06,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893331492] [2024-09-25 11:29:06,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:29:06,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:29:06,232 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:29:06,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 11:29:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-25 11:29:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:29:06,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-25 11:29:06,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:29:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-25 11:29:06,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:29:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-25 11:29:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893331492] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:29:07,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:29:07,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-25 11:29:07,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269859302] [2024-09-25 11:29:07,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:29:07,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 11:29:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 11:29:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 11:29:07,422 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) [2024-09-25 11:29:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:29:08,106 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-25 11:29:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-25 11:29:08,106 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 [2024-09-25 11:29:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:29:08,107 INFO L225 Difference]: With dead ends: 67 [2024-09-25 11:29:08,107 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 11:29:08,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 11:29:08,108 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:29:08,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 828 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:29:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 11:29:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-25 11:29:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-25 11:29:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-25 11:29:08,114 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-25 11:29:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:29:08,114 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-25 11:29:08,115 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) [2024-09-25 11:29:08,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-25 11:29:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-25 11:29:08,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:29:08,116 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:29:08,134 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 11:29:08,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 11:29:08,317 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:29:08,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-25 11:29:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:29:08,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956040050] [2024-09-25 11:29:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:08,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:29:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:29:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:29:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:08,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-25 11:29:09,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:29:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956040050] [2024-09-25 11:29:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956040050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:29:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265221753] [2024-09-25 11:29:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:29:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:29:09,277 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:29:09,279 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 11:29:09,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:29:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:29:09,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 11:29:09,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:29:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-25 11:29:09,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:29:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265221753] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:29:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:29:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-25 11:29:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123716116] [2024-09-25 11:29:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:29:09,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:29:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:29:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-25 11:29:09,858 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) [2024-09-25 11:29:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:29:10,027 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-25 11:29:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 11:29:10,027 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 [2024-09-25 11:29:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:29:10,028 INFO L225 Difference]: With dead ends: 63 [2024-09-25 11:29:10,028 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 11:29:10,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 11:29:10,029 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:29:10,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 175 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:29:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 11:29:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 11:29:10,029 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) [2024-09-25 11:29:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 11:29:10,029 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-25 11:29:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:29:10,030 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 11:29:10,030 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) [2024-09-25 11:29:10,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 11:29:10,030 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 11:29:10,032 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 11:29:10,047 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 11:29:10,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:10,235 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-25 11:29:10,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 11:29:11,002 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-25 11:29:11,011 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 11:29:11,012 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 11:29:11,024 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 11:29:11,024 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 11:29:11,024 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 11:29:11,024 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 11:29:11,024 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 11:29:11,025 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 11:29:11,026 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 11:29:11,026 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 11:29:11,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:29:11 BoogieIcfgContainer [2024-09-25 11:29:11,029 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-25 11:29:11,029 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-25 11:29:11,029 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-25 11:29:11,029 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-25 11:29:11,030 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:14" (3/4) ... [2024-09-25 11:29:11,031 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-25 11:29:11,071 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-25 11:29:11,072 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-25 11:29:11,073 INFO L158 Benchmark]: Toolchain (without parser) took 57378.23ms. Allocated memory was 75.5MB in the beginning and 664.8MB in the end (delta: 589.3MB). Free memory was 53.7MB in the beginning and 525.9MB in the end (delta: -472.1MB). Peak memory consumption was 118.4MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,073 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 11:29:11,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.60ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 42.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,073 INFO L158 Benchmark]: Boogie Procedure Inliner took 13.37ms. Allocated memory is still 75.5MB. Free memory was 42.8MB in the beginning and 41.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,074 INFO L158 Benchmark]: Boogie Preprocessor took 26.03ms. Allocated memory is still 75.5MB. Free memory was 41.7MB in the beginning and 40.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 11:29:11,074 INFO L158 Benchmark]: RCFGBuilder took 278.10ms. Allocated memory was 75.5MB in the beginning and 104.9MB in the end (delta: 29.4MB). Free memory was 40.3MB in the beginning and 80.1MB in the end (delta: -39.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,074 INFO L158 Benchmark]: TraceAbstraction took 56853.94ms. Allocated memory was 104.9MB in the beginning and 664.8MB in the end (delta: 559.9MB). Free memory was 79.1MB in the beginning and 528.0MB in the end (delta: -448.9MB). Peak memory consumption was 406.2MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,075 INFO L158 Benchmark]: Witness Printer took 42.73ms. Allocated memory is still 664.8MB. Free memory was 528.0MB in the beginning and 525.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 11:29:11,078 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.60ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 42.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 13.37ms. Allocated memory is still 75.5MB. Free memory was 42.8MB in the beginning and 41.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.03ms. Allocated memory is still 75.5MB. Free memory was 41.7MB in the beginning and 40.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.10ms. Allocated memory was 75.5MB in the beginning and 104.9MB in the end (delta: 29.4MB). Free memory was 40.3MB in the beginning and 80.1MB in the end (delta: -39.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 56853.94ms. Allocated memory was 104.9MB in the beginning and 664.8MB in the end (delta: 559.9MB). Free memory was 79.1MB in the beginning and 528.0MB in the end (delta: -448.9MB). Peak memory consumption was 406.2MB. Max. memory is 16.1GB. * Witness Printer took 42.73ms. Allocated memory is still 664.8MB. Free memory was 528.0MB in the beginning and 525.9MB 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid * 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: 56.0s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 954 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 786 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 0.9s 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, 4.4s 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, 0.3s SatisfiabilityAnalysisTime, 47.0s 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) && (x == 3)) || (15 < x)) || ((11 == \result) && (x == 11))) || ((x == 6) && (6 == \result))) || ((9 == \result) && (x == 9))) || ((2 == \result) && (x == 2))) || ((10 == \result) && (x == 10))) || ((5 == \result) && (5 == x))) || ((8 == \result) && (x == 8))) || ((7 == \result) && (7 == x))) || ((12 == \result) && (x == 12))) || ((\result == 1) && (x == 1))) || ((14 == \result) && (x == 14))) || ((x == 4) && (4 == \result))) || ((x == 15) && (15 == \result))) || ((13 == \result) && (x == 13))) || ((\result == 0) && (x == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-25 11:29:11,105 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