./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:29:35,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:29:35,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:29:35,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:29:35,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:29:35,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:29:35,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:29:35,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:29:35,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:29:35,640 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:29:35,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:29:35,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:29:35,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:29:35,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:29:35,643 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:29:35,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:29:35,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:29:35,644 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:29:35,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:29:35,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:29:35,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:29:35,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:29:35,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:29:35,648 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:29:35,648 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:29:35,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:29:35,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:29:35,649 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:29:35,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:29:35,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:29:35,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:29:35,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:29:35,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:29:35,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:29:35,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:29:35,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:29:35,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:29:35,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:29:35,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:29:35,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:29:35,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:29:35,652 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:29:35,652 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:29:35,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:29:35,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:29:35,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:29:35,863 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:29:35,863 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:29:35,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-21 12:29:37,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:29:37,242 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:29:37,242 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-21 12:29:37,247 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9fbbc671c/fb6530225c3b40c8bc90a635dc5d6b2d/FLAG3df5ab860 [2024-09-21 12:29:37,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9fbbc671c/fb6530225c3b40c8bc90a635dc5d6b2d [2024-09-21 12:29:37,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:29:37,672 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:29:37,674 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:29:37,674 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:29:37,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:29:37,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a516459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37, skipping insertion in model container [2024-09-21 12:29:37,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,694 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:29:37,843 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] [2024-09-21 12:29:37,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:29:37,853 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:29:37,861 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] [2024-09-21 12:29:37,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:29:37,875 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:29:37,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37 WrapperNode [2024-09-21 12:29:37,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:29:37,877 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:29:37,877 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:29:37,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:29:37,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,891 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:29:37,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:29:37,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:29:37,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:29:37,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:29:37,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,900 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,907 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]. [2024-09-21 12:29:37,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:29:37,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:29:37,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:29:37,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:29:37,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (1/1) ... [2024-09-21 12:29:37,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:29:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:37,938 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) [2024-09-21 12:29:37,941 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 [2024-09-21 12:29:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:29:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:29:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:29:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:29:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:29:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:29:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:29:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:29:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-21 12:29:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-21 12:29:38,022 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:29:38,024 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:29:38,107 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-21 12:29:38,108 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:29:38,130 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:29:38,130 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:29:38,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:38 BoogieIcfgContainer [2024-09-21 12:29:38,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:29:38,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:29:38,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:29:38,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:29:38,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:29:37" (1/3) ... [2024-09-21 12:29:38,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28820da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:29:38, skipping insertion in model container [2024-09-21 12:29:38,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:37" (2/3) ... [2024-09-21 12:29:38,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28820da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:29:38, skipping insertion in model container [2024-09-21 12:29:38,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:38" (3/3) ... [2024-09-21 12:29:38,138 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-21 12:29:38,151 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:29:38,151 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:29:38,188 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:29:38,193 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;@15087f16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:29:38,194 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:29:38,196 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) [2024-09-21 12:29:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 12:29:38,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:38,202 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:38,203 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:38,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-21 12:29:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:38,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232918507] [2024-09-21 12:29:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:29:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232918507] [2024-09-21 12:29:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232918507] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:29:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:29:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:29:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866478402] [2024-09-21 12:29:38,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:29:38,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:29:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:29:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:29:38,429 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) [2024-09-21 12:29:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:38,471 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-21 12:29:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:29:38,473 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 [2024-09-21 12:29:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:38,480 INFO L225 Difference]: With dead ends: 30 [2024-09-21 12:29:38,480 INFO L226 Difference]: Without dead ends: 18 [2024-09-21 12:29:38,482 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 [2024-09-21 12:29:38,486 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 [2024-09-21 12:29:38,487 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] [2024-09-21 12:29:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-21 12:29:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-21 12:29:38,515 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) [2024-09-21 12:29:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-21 12:29:38,517 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-21 12:29:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:38,517 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-21 12:29:38,518 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) [2024-09-21 12:29:38,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-21 12:29:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-21 12:29:38,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:38,521 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:38,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:29:38,522 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:38,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-21 12:29:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:38,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473400211] [2024-09-21 12:29:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:38,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:29:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473400211] [2024-09-21 12:29:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473400211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232785666] [2024-09-21 12:29:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:38,747 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) [2024-09-21 12:29:38,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:29:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:38,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 12:29:38,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:29:38,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:29:39,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232785666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:39,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:39,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-21 12:29:39,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878236772] [2024-09-21 12:29:39,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:39,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 12:29:39,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 12:29:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:29:39,093 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) [2024-09-21 12:29:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:39,147 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-21 12:29:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 12:29:39,148 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 [2024-09-21 12:29:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:39,148 INFO L225 Difference]: With dead ends: 25 [2024-09-21 12:29:39,148 INFO L226 Difference]: Without dead ends: 21 [2024-09-21 12:29:39,149 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 [2024-09-21 12:29:39,151 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 [2024-09-21 12:29:39,152 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] [2024-09-21 12:29:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-21 12:29:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-21 12:29:39,160 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) [2024-09-21 12:29:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-21 12:29:39,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-21 12:29:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:39,161 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-21 12:29:39,161 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) [2024-09-21 12:29:39,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-21 12:29:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 12:29:39,163 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:39,163 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:39,177 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:29:39,363 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 [2024-09-21 12:29:39,364 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:39,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-21 12:29:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:39,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862967387] [2024-09-21 12:29:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:39,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:39,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:39,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:39,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:29:39,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:39,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862967387] [2024-09-21 12:29:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862967387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:39,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197107300] [2024-09-21 12:29:39,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:29:39,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:39,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:39,549 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) [2024-09-21 12:29:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:29:39,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:29:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:39,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:29:39,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 12:29:39,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 12:29:39,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197107300] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:39,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:39,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-21 12:29:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883398744] [2024-09-21 12:29:39,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:39,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 12:29:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 12:29:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:29:39,919 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) [2024-09-21 12:29:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:39,980 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-21 12:29:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:29:39,980 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 [2024-09-21 12:29:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:39,981 INFO L225 Difference]: With dead ends: 28 [2024-09-21 12:29:39,981 INFO L226 Difference]: Without dead ends: 24 [2024-09-21 12:29:39,981 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 [2024-09-21 12:29:39,982 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 [2024-09-21 12:29:39,982 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] [2024-09-21 12:29:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-21 12:29:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-21 12:29:39,988 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) [2024-09-21 12:29:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-21 12:29:39,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-21 12:29:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:39,990 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-21 12:29:39,990 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) [2024-09-21 12:29:39,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-21 12:29:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 12:29:39,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:39,991 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:40,005 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:29:40,191 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 [2024-09-21 12:29:40,192 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:40,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-21 12:29:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:40,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407993565] [2024-09-21 12:29:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:29:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407993565] [2024-09-21 12:29:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407993565] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669172134] [2024-09-21 12:29:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:29:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:40,401 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) [2024-09-21 12:29:40,402 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:29:40,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:29:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:40,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 12:29:40,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 12:29:40,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:29:40,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669172134] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:40,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:40,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-21 12:29:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776935202] [2024-09-21 12:29:40,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:40,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:29:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:29:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:29:40,869 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) [2024-09-21 12:29:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:40,917 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-21 12:29:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:29:40,917 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 [2024-09-21 12:29:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:40,918 INFO L225 Difference]: With dead ends: 31 [2024-09-21 12:29:40,918 INFO L226 Difference]: Without dead ends: 27 [2024-09-21 12:29:40,918 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 [2024-09-21 12:29:40,919 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 [2024-09-21 12:29:40,919 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] [2024-09-21 12:29:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-21 12:29:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-21 12:29:40,926 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) [2024-09-21 12:29:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-21 12:29:40,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-21 12:29:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:40,928 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-21 12:29:40,928 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) [2024-09-21 12:29:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-21 12:29:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-21 12:29:40,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:40,929 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:40,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:41,129 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 [2024-09-21 12:29:41,130 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:41,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-21 12:29:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57897050] [2024-09-21 12:29:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-21 12:29:41,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:41,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57897050] [2024-09-21 12:29:41,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57897050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:41,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540760962] [2024-09-21 12:29:41,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:29:41,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:41,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:41,341 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) [2024-09-21 12:29:41,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:29:41,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:29:41,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:41,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 12:29:41,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:29:41,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 12:29:41,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540760962] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:41,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:41,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-21 12:29:41,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166342770] [2024-09-21 12:29:41,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:41,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:29:41,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:29:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-21 12:29:41,991 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) [2024-09-21 12:29:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:42,049 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-21 12:29:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:29:42,050 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 [2024-09-21 12:29:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:42,051 INFO L225 Difference]: With dead ends: 34 [2024-09-21 12:29:42,051 INFO L226 Difference]: Without dead ends: 30 [2024-09-21 12:29:42,051 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 [2024-09-21 12:29:42,052 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 [2024-09-21 12:29:42,052 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] [2024-09-21 12:29:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-21 12:29:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-21 12:29:42,056 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) [2024-09-21 12:29:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-21 12:29:42,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-21 12:29:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:42,057 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-21 12:29:42,057 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) [2024-09-21 12:29:42,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-21 12:29:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 12:29:42,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:42,059 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:42,075 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:42,259 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 [2024-09-21 12:29:42,260 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:42,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-21 12:29:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:42,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441592265] [2024-09-21 12:29:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-21 12:29:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441592265] [2024-09-21 12:29:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441592265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399591634] [2024-09-21 12:29:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:29:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:42,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:42,492 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) [2024-09-21 12:29:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:29:42,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-21 12:29:42,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:42,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 12:29:42,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:29:42,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 12:29:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399591634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:43,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:43,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-21 12:29:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312109440] [2024-09-21 12:29:43,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:43,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:29:43,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:29:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:29:43,414 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) [2024-09-21 12:29:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:43,481 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-21 12:29:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:29:43,481 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 [2024-09-21 12:29:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:43,482 INFO L225 Difference]: With dead ends: 37 [2024-09-21 12:29:43,482 INFO L226 Difference]: Without dead ends: 33 [2024-09-21 12:29:43,482 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 [2024-09-21 12:29:43,483 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 [2024-09-21 12:29:43,483 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] [2024-09-21 12:29:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-21 12:29:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-21 12:29:43,487 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) [2024-09-21 12:29:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-21 12:29:43,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-21 12:29:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:43,488 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-21 12:29:43,488 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) [2024-09-21 12:29:43,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-21 12:29:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 12:29:43,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:43,489 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:43,501 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:43,693 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 [2024-09-21 12:29:43,694 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:43,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-21 12:29:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253331243] [2024-09-21 12:29:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-21 12:29:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253331243] [2024-09-21 12:29:43,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253331243] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999342324] [2024-09-21 12:29:43,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:29:43,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:43,908 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) [2024-09-21 12:29:43,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:29:43,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-21 12:29:43,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:43,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 12:29:43,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-21 12:29:44,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-21 12:29:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999342324] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:45,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-21 12:29:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285049239] [2024-09-21 12:29:45,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:45,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 12:29:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 12:29:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-21 12:29:45,097 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) [2024-09-21 12:29:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:45,163 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-21 12:29:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:29:45,164 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 [2024-09-21 12:29:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:45,165 INFO L225 Difference]: With dead ends: 40 [2024-09-21 12:29:45,165 INFO L226 Difference]: Without dead ends: 36 [2024-09-21 12:29:45,165 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 [2024-09-21 12:29:45,166 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 [2024-09-21 12:29:45,167 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] [2024-09-21 12:29:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-21 12:29:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-21 12:29:45,174 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) [2024-09-21 12:29:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-21 12:29:45,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-21 12:29:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:45,178 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-21 12:29:45,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-21 12:29:45,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-21 12:29:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 12:29:45,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:45,179 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:45,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:29:45,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:45,384 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:45,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-21 12:29:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:45,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554606409] [2024-09-21 12:29:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-21 12:29:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554606409] [2024-09-21 12:29:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554606409] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62593382] [2024-09-21 12:29:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 12:29:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:45,668 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) [2024-09-21 12:29:45,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:29:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-21 12:29:45,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-21 12:29:45,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 12:29:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62593382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:47,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:47,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-21 12:29:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103931936] [2024-09-21 12:29:47,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:47,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:29:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:29:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:29:47,204 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) [2024-09-21 12:29:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:47,286 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-21 12:29:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:29:47,287 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 [2024-09-21 12:29:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:47,288 INFO L225 Difference]: With dead ends: 43 [2024-09-21 12:29:47,288 INFO L226 Difference]: Without dead ends: 39 [2024-09-21 12:29:47,288 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 [2024-09-21 12:29:47,289 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 [2024-09-21 12:29:47,289 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] [2024-09-21 12:29:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-21 12:29:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-21 12:29:47,293 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) [2024-09-21 12:29:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-21 12:29:47,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-21 12:29:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:47,294 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-21 12:29:47,294 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) [2024-09-21 12:29:47,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-21 12:29:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-21 12:29:47,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:47,295 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:47,309 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:29:47,495 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 [2024-09-21 12:29:47,495 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:47,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-21 12:29:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132643503] [2024-09-21 12:29:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-21 12:29:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132643503] [2024-09-21 12:29:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132643503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761198759] [2024-09-21 12:29:47,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:29:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:47,814 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) [2024-09-21 12:29:47,816 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:29:47,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:29:47,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:47,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-21 12:29:47,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-21 12:29:47,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-21 12:29:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761198759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:49,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:49,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-21 12:29:49,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711283276] [2024-09-21 12:29:49,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:49,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:29:49,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:29:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:29:49,886 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) [2024-09-21 12:29:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:49,974 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-21 12:29:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 12:29:49,977 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 [2024-09-21 12:29:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:49,978 INFO L225 Difference]: With dead ends: 46 [2024-09-21 12:29:49,978 INFO L226 Difference]: Without dead ends: 42 [2024-09-21 12:29:49,979 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 [2024-09-21 12:29:49,979 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 [2024-09-21 12:29:49,980 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] [2024-09-21 12:29:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-21 12:29:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-21 12:29:49,983 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) [2024-09-21 12:29:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-21 12:29:49,984 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-21 12:29:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:49,984 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-21 12:29:49,984 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) [2024-09-21 12:29:49,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-21 12:29:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-21 12:29:49,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:49,985 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:49,998 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:50,186 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 [2024-09-21 12:29:50,186 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:50,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-21 12:29:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587418059] [2024-09-21 12:29:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-21 12:29:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587418059] [2024-09-21 12:29:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587418059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766626636] [2024-09-21 12:29:50,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:29:50,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:50,570 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) [2024-09-21 12:29:50,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:29:50,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-21 12:29:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:50,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 12:29:50,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-21 12:29:50,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-21 12:29:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766626636] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:53,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:53,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-21 12:29:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114842262] [2024-09-21 12:29:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:53,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-21 12:29:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-21 12:29:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-21 12:29:53,322 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) [2024-09-21 12:29:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:53,421 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-21 12:29:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:29:53,421 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 [2024-09-21 12:29:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:53,422 INFO L225 Difference]: With dead ends: 49 [2024-09-21 12:29:53,422 INFO L226 Difference]: Without dead ends: 45 [2024-09-21 12:29:53,422 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 [2024-09-21 12:29:53,423 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 [2024-09-21 12:29:53,423 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] [2024-09-21 12:29:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-21 12:29:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-21 12:29:53,427 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) [2024-09-21 12:29:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-21 12:29:53,427 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-21 12:29:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:53,427 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-21 12:29:53,427 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) [2024-09-21 12:29:53,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-21 12:29:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-21 12:29:53,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:53,429 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:53,441 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:53,631 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 [2024-09-21 12:29:53,632 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:53,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-21 12:29:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637845167] [2024-09-21 12:29:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:53,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:54,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-21 12:29:54,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:54,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637845167] [2024-09-21 12:29:54,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637845167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:54,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784002101] [2024-09-21 12:29:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:29:54,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:54,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:54,047 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) [2024-09-21 12:29:54,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:29:54,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:29:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:54,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 12:29:54,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-21 12:29:54,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-21 12:29:57,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784002101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:57,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:57,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-21 12:29:57,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935314291] [2024-09-21 12:29:57,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:57,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-21 12:29:57,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-21 12:29:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-21 12:29:57,799 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) [2024-09-21 12:29:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:57,908 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-21 12:29:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:29:57,908 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 [2024-09-21 12:29:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:57,909 INFO L225 Difference]: With dead ends: 52 [2024-09-21 12:29:57,909 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:29:57,910 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 [2024-09-21 12:29:57,910 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:57,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 136 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:29:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:29:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-21 12:29:57,920 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) [2024-09-21 12:29:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-21 12:29:57,921 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-21 12:29:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:57,921 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-21 12:29:57,922 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) [2024-09-21 12:29:57,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-21 12:29:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 12:29:57,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:57,925 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:57,939 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:58,126 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 [2024-09-21 12:29:58,126 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:58,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-21 12:29:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:58,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940715022] [2024-09-21 12:29:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-21 12:29:58,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:58,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940715022] [2024-09-21 12:29:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940715022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:58,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973018940] [2024-09-21 12:29:58,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:29:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:58,688 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) [2024-09-21 12:29:58,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:29:58,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-21 12:29:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:58,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-21 12:29:58,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-21 12:29:58,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-21 12:30:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973018940] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:03,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:03,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-21 12:30:03,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240023811] [2024-09-21 12:30:03,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:03,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-21 12:30:03,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-21 12:30:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 12:30:03,467 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) [2024-09-21 12:30:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:03,586 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-21 12:30:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:30:03,587 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 [2024-09-21 12:30:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:03,587 INFO L225 Difference]: With dead ends: 55 [2024-09-21 12:30:03,587 INFO L226 Difference]: Without dead ends: 51 [2024-09-21 12:30:03,588 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 [2024-09-21 12:30:03,588 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:03,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 146 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:30:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-21 12:30:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-21 12:30:03,592 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) [2024-09-21 12:30:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-21 12:30:03,593 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-21 12:30:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:03,593 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-21 12:30:03,593 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) [2024-09-21 12:30:03,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-21 12:30:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 12:30:03,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:03,594 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:03,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:03,794 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 [2024-09-21 12:30:03,795 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:03,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:03,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-21 12:30:03,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:03,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230067710] [2024-09-21 12:30:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:03,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:03,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:03,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-21 12:30:04,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:04,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230067710] [2024-09-21 12:30:04,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230067710] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:04,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314926773] [2024-09-21 12:30:04,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:30:04,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:04,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:04,390 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) [2024-09-21 12:30:04,391 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:30:04,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-21 12:30:04,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:04,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-21 12:30:04,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-21 12:30:04,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-21 12:30:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314926773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:10,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:10,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-21 12:30:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47754376] [2024-09-21 12:30:10,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:10,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 12:30:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 12:30:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:30:10,345 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) [2024-09-21 12:30:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:10,474 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-21 12:30:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:30:10,474 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 [2024-09-21 12:30:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:10,476 INFO L225 Difference]: With dead ends: 58 [2024-09-21 12:30:10,476 INFO L226 Difference]: Without dead ends: 54 [2024-09-21 12:30:10,477 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 [2024-09-21 12:30:10,477 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:10,478 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:30:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-21 12:30:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-21 12:30:10,482 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) [2024-09-21 12:30:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-21 12:30:10,482 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-21 12:30:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:10,483 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-21 12:30:10,483 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) [2024-09-21 12:30:10,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-21 12:30:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-21 12:30:10,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:10,485 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:10,499 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:10,686 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 [2024-09-21 12:30:10,686 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:10,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-21 12:30:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:10,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067346303] [2024-09-21 12:30:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:10,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:10,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:10,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:10,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:10,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:10,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-21 12:30:11,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067346303] [2024-09-21 12:30:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067346303] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080574881] [2024-09-21 12:30:11,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 12:30:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:11,291 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) [2024-09-21 12:30:11,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:30:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-21 12:30:11,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-21 12:30:11,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-21 12:30:19,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080574881] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:19,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:19,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-21 12:30:19,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894568180] [2024-09-21 12:30:19,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:19,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-21 12:30:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-21 12:30:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 12:30:19,028 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) [2024-09-21 12:30:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:19,181 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-21 12:30:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 12:30:19,182 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 [2024-09-21 12:30:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:19,183 INFO L225 Difference]: With dead ends: 61 [2024-09-21 12:30:19,183 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 12:30:19,184 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 [2024-09-21 12:30:19,184 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:19,184 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] [2024-09-21 12:30:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 12:30:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-21 12:30:19,189 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) [2024-09-21 12:30:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-21 12:30:19,190 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-21 12:30:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:19,190 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-21 12:30:19,190 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) [2024-09-21 12:30:19,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-21 12:30:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-21 12:30:19,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:19,191 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:19,205 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:19,391 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 [2024-09-21 12:30:19,392 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:19,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-21 12:30:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:19,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250619693] [2024-09-21 12:30:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:19,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-21 12:30:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250619693] [2024-09-21 12:30:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250619693] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78587423] [2024-09-21 12:30:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:30:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:20,051 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) [2024-09-21 12:30:20,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 12:30:20,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:30:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:20,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-21 12:30:20,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-21 12:30:20,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-21 12:30:29,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78587423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:29,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:29,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-21 12:30:29,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512254437] [2024-09-21 12:30:29,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:29,660 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-21 12:30:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-21 12:30:29,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 12:30:29,661 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) [2024-09-21 12:30:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:29,843 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-21 12:30:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:30:29,843 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 [2024-09-21 12:30:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:29,844 INFO L225 Difference]: With dead ends: 64 [2024-09-21 12:30:29,844 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:30:29,845 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-21 12:30:29,845 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:29,846 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] [2024-09-21 12:30:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:30:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-21 12:30:29,855 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) [2024-09-21 12:30:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-21 12:30:29,856 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-21 12:30:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:29,857 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-21 12:30:29,857 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) [2024-09-21 12:30:29,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-21 12:30:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-21 12:30:29,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:29,859 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:29,886 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:30,059 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 [2024-09-21 12:30:30,059 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:30,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-21 12:30:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:30,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220335884] [2024-09-21 12:30:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:30,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-21 12:30:31,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:31,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220335884] [2024-09-21 12:30:31,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220335884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:31,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159040763] [2024-09-21 12:30:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:30:31,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:31,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:31,315 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) [2024-09-21 12:30:31,316 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 12:30:31,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-21 12:30:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:31,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-21 12:30:31,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-21 12:30:31,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-21 12:30:32,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159040763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:32,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:32,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-21 12:30:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026307428] [2024-09-21 12:30:32,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:32,682 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-21 12:30:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-21 12:30:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 12:30:32,683 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) [2024-09-21 12:30:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:33,470 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-21 12:30:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-21 12:30:33,470 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 [2024-09-21 12:30:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:33,471 INFO L225 Difference]: With dead ends: 67 [2024-09-21 12:30:33,471 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 12:30:33,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-21 12:30:33,473 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:33,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 828 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:30:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 12:30:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-21 12:30:33,479 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) [2024-09-21 12:30:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-21 12:30:33,479 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-21 12:30:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:33,480 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-21 12:30:33,480 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) [2024-09-21 12:30:33,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-21 12:30:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 12:30:33,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:33,481 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:33,502 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:33,681 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 [2024-09-21 12:30:33,681 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:33,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-21 12:30:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369437144] [2024-09-21 12:30:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:33,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:33,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-21 12:30:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369437144] [2024-09-21 12:30:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369437144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650159798] [2024-09-21 12:30:34,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:30:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:34,813 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) [2024-09-21 12:30:34,820 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 12:30:35,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:30:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:35,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-21 12:30:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-21 12:30:35,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:30:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650159798] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:30:35,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:30:35,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-21 12:30:35,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327770561] [2024-09-21 12:30:35,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:30:35,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:30:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:30:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:30:35,583 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) [2024-09-21 12:30:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:35,765 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-21 12:30:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 12:30:35,765 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 [2024-09-21 12:30:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:35,766 INFO L225 Difference]: With dead ends: 63 [2024-09-21 12:30:35,766 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:30:35,767 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 [2024-09-21 12:30:35,767 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 [2024-09-21 12:30:35,768 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] [2024-09-21 12:30:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:30:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:30:35,768 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) [2024-09-21 12:30:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:30:35,768 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-21 12:30:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:35,768 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:30:35,768 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) [2024-09-21 12:30:35,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:30:35,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:30:35,771 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:30:35,786 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-21 12:30:35,971 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 [2024-09-21 12:30:35,974 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-21 12:30:35,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:30:36,878 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:30:36,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:30:36 BoogieIcfgContainer [2024-09-21 12:30:36,903 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 12:30:36,903 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 12:30:36,903 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 12:30:36,904 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 12:30:36,904 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:38" (3/4) ... [2024-09-21 12:30:36,906 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 12:30:36,951 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 12:30:36,951 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 12:30:36,952 INFO L158 Benchmark]: Toolchain (without parser) took 59279.67ms. Allocated memory was 138.4MB in the beginning and 673.2MB in the end (delta: 534.8MB). Free memory was 66.9MB in the beginning and 513.2MB in the end (delta: -446.2MB). Peak memory consumption was 90.0MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,952 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 138.4MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.02ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 66.7MB in the beginning and 154.5MB in the end (delta: -87.9MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.19ms. Allocated memory is still 184.5MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: Boogie Preprocessor took 22.37ms. Allocated memory is still 184.5MB. Free memory was 153.5MB in the beginning and 152.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: RCFGBuilder took 216.55ms. Allocated memory is still 184.5MB. Free memory was 152.4MB in the beginning and 139.9MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: TraceAbstraction took 58770.68ms. Allocated memory was 184.5MB in the beginning and 673.2MB in the end (delta: 488.6MB). Free memory was 139.9MB in the beginning and 515.3MB in the end (delta: -375.4MB). Peak memory consumption was 395.3MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,953 INFO L158 Benchmark]: Witness Printer took 47.74ms. Allocated memory is still 673.2MB. Free memory was 515.3MB in the beginning and 513.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:30:36,954 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 138.4MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.02ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 66.7MB in the beginning and 154.5MB in the end (delta: -87.9MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.19ms. Allocated memory is still 184.5MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.37ms. Allocated memory is still 184.5MB. Free memory was 153.5MB in the beginning and 152.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 216.55ms. Allocated memory is still 184.5MB. Free memory was 152.4MB in the beginning and 139.9MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 58770.68ms. Allocated memory was 184.5MB in the beginning and 673.2MB in the end (delta: 488.6MB). Free memory was 139.9MB in the beginning and 515.3MB in the end (delta: -375.4MB). Peak memory consumption was 395.3MB. Max. memory is 16.1GB. * Witness Printer took 47.74ms. Allocated memory is still 673.2MB. Free memory was 515.3MB in the beginning and 513.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.8s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, 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, 4.5s 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, 0.4s SatisfiabilityAnalysisTime, 48.5s 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! [2024-09-21 12:30:36,996 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE