./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_6.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/loop-simple/nested_6.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 e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:54:50,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:54:50,910 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:54:50,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:54:50,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:54:50,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:54:50,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:54:50,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:54:50,952 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:54:50,953 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:54:50,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:54:50,954 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:54:50,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:54:50,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:54:50,955 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:54:50,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:54:50,957 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:54:50,957 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:54:50,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:54:50,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:54:50,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:54:50,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:54:50,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:54:50,962 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:54:50,963 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:54:50,963 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:54:50,963 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:54:50,963 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:54:50,964 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:54:50,964 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:54:50,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:54:50,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:54:50,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:54:50,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:54:50,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:54:50,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:54:50,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:54:50,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:54:50,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:54:50,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:54:50,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:54:50,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:54:50,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:54:51,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:54:51,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:54:51,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:54:51,254 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:54:51,254 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:54:51,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-simple/nested_6.c [2024-09-12 22:54:52,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:54:52,839 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:54:52,840 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_6.c [2024-09-12 22:54:52,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/163dd3d64/0bff5c9503b042e3ba8bfd1ad66f7123/FLAGc2a7b21d3 [2024-09-12 22:54:52,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/163dd3d64/0bff5c9503b042e3ba8bfd1ad66f7123 [2024-09-12 22:54:52,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:54:52,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:54:52,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:54:52,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:54:52,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:54:52,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:54:52" (1/1) ... [2024-09-12 22:54:52,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e47521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:52, skipping insertion in model container [2024-09-12 22:54:52,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:54:52" (1/1) ... [2024-09-12 22:54:52,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:54:53,070 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2024-09-12 22:54:53,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:54:53,096 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:54:53,111 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2024-09-12 22:54:53,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:54:53,131 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:54:53,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53 WrapperNode [2024-09-12 22:54:53,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:54:53,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:54:53,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:54:53,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:54:53,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,149 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:54:53,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:54:53,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:54:53,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:54:53,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:54:53,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,173 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]. [2024-09-12 22:54:53,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,173 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,188 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:54:53,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:54:53,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:54:53,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:54:53,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (1/1) ... [2024-09-12 22:54:53,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:54:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:53,217 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) [2024-09-12 22:54:53,219 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 [2024-09-12 22:54:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:54:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:54:53,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:54:53,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:54:53,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:54:53,316 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:54:53,318 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:54:53,463 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-12 22:54:53,463 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:54:53,507 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:54:53,507 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-12 22:54:53,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:54:53 BoogieIcfgContainer [2024-09-12 22:54:53,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:54:53,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:54:53,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:54:53,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:54:53,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:54:52" (1/3) ... [2024-09-12 22:54:53,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73282fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:54:53, skipping insertion in model container [2024-09-12 22:54:53,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:54:53" (2/3) ... [2024-09-12 22:54:53,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73282fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:54:53, skipping insertion in model container [2024-09-12 22:54:53,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:54:53" (3/3) ... [2024-09-12 22:54:53,519 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2024-09-12 22:54:53,537 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:54:53,538 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:54:53,603 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:54:53,612 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;@5e97945e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:54:53,612 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:54:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 22:54:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-12 22:54:53,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:53,628 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:53,629 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:53,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2016834771, now seen corresponding path program 1 times [2024-09-12 22:54:53,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:53,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743155406] [2024-09-12 22:54:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:53,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:53,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743155406] [2024-09-12 22:54:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743155406] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:53,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722447451] [2024-09-12 22:54:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:53,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:53,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:53,905 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:53,955 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2024-09-12 22:54:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2024-09-12 22:54:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:53,963 INFO L225 Difference]: With dead ends: 52 [2024-09-12 22:54:53,963 INFO L226 Difference]: Without dead ends: 30 [2024-09-12 22:54:53,966 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:53,969 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:53,970 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-12 22:54:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2024-09-12 22:54:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-12 22:54:53,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 8 [2024-09-12 22:54:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:53,999 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-12 22:54:53,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-12 22:54:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-12 22:54:54,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,001 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,001 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:54:54,002 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1227354490, now seen corresponding path program 1 times [2024-09-12 22:54:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107904039] [2024-09-12 22:54:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107904039] [2024-09-12 22:54:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107904039] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:54,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:54,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842337460] [2024-09-12 22:54:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,065 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,094 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2024-09-12 22:54:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-12 22:54:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,095 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:54:54,096 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 22:54:54,097 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,098 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 22:54:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2024-09-12 22:54:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-12 22:54:54,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 11 [2024-09-12 22:54:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,111 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-12 22:54:54,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-12 22:54:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 22:54:54,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,114 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:54:54,115 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 139424289, now seen corresponding path program 1 times [2024-09-12 22:54:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870085169] [2024-09-12 22:54:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870085169] [2024-09-12 22:54:54,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870085169] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:54,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:54,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:54,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519237311] [2024-09-12 22:54:54,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:54,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,217 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,251 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-09-12 22:54:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-12 22:54:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,252 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:54:54,252 INFO L226 Difference]: Without dead ends: 28 [2024-09-12 22:54:54,252 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,254 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,254 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-12 22:54:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2024-09-12 22:54:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-12 22:54:54,265 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2024-09-12 22:54:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,266 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-12 22:54:54,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-12 22:54:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:54:54,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,269 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:54:54,269 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 371784402, now seen corresponding path program 1 times [2024-09-12 22:54:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007106751] [2024-09-12 22:54:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007106751] [2024-09-12 22:54:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007106751] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:54,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:54,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:54,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632004796] [2024-09-12 22:54:54,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,361 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,395 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2024-09-12 22:54:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 22:54:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,397 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:54:54,397 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 22:54:54,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,398 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 22:54:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-09-12 22:54:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-09-12 22:54:54,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2024-09-12 22:54:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,405 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-09-12 22:54:54,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-09-12 22:54:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:54:54,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,406 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,406 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 22:54:54,407 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1468430149, now seen corresponding path program 1 times [2024-09-12 22:54:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219748865] [2024-09-12 22:54:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219748865] [2024-09-12 22:54:54,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219748865] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:54,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422023117] [2024-09-12 22:54:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,472 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,494 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-09-12 22:54:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-12 22:54:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,497 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:54:54,497 INFO L226 Difference]: Without dead ends: 26 [2024-09-12 22:54:54,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,500 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-12 22:54:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-09-12 22:54:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-09-12 22:54:54,510 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 20 [2024-09-12 22:54:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,510 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-09-12 22:54:54,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-09-12 22:54:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:54:54,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,514 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 22:54:54,514 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash 880229710, now seen corresponding path program 1 times [2024-09-12 22:54:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880383966] [2024-09-12 22:54:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880383966] [2024-09-12 22:54:54,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880383966] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:54:54,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:54:54,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:54:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081161543] [2024-09-12 22:54:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:54:54,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:54:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,560 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,572 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-09-12 22:54:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:54:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-12 22:54:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,574 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:54:54,574 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 22:54:54,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:54:54,575 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 22:54:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-12 22:54:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-09-12 22:54:54,580 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2024-09-12 22:54:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,580 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-09-12 22:54:54,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-09-12 22:54:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:54:54,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,582 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 22:54:54,582 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:54,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1487910188, now seen corresponding path program 1 times [2024-09-12 22:54:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689333820] [2024-09-12 22:54:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689333820] [2024-09-12 22:54:54,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689333820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:54,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005298622] [2024-09-12 22:54:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:54,667 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) [2024-09-12 22:54:54,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:54:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:54,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-12 22:54:54,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:54,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005298622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:54,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:54,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 22:54:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964406586] [2024-09-12 22:54:54,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:54,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:54:54,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:54:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:54:54,800 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:54,830 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-09-12 22:54:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:54:54,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 22:54:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:54,832 INFO L225 Difference]: With dead ends: 47 [2024-09-12 22:54:54,832 INFO L226 Difference]: Without dead ends: 28 [2024-09-12 22:54:54,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:54:54,833 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:54,835 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-12 22:54:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-12 22:54:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-09-12 22:54:54,843 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2024-09-12 22:54:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:54,843 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-09-12 22:54:54,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:54,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-09-12 22:54:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:54:54,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:54,845 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:54,858 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:54:55,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:54:55,046 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:55,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1161476914, now seen corresponding path program 2 times [2024-09-12 22:54:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:55,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036942060] [2024-09-12 22:54:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:55,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:54:55,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:55,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036942060] [2024-09-12 22:54:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036942060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005446597] [2024-09-12 22:54:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:54:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:55,102 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) [2024-09-12 22:54:55,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:54:55,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:54:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:54:55,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 22:54:55,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:55,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:54:55,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005446597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:55,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:55,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2024-09-12 22:54:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468680294] [2024-09-12 22:54:55,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:55,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:54:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:54:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:54:55,262 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:55,414 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2024-09-12 22:54:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 22:54:55,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-12 22:54:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:55,416 INFO L225 Difference]: With dead ends: 69 [2024-09-12 22:54:55,416 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 22:54:55,417 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:54:55,418 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:55,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:54:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 22:54:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-09-12 22:54:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-09-12 22:54:55,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 27 [2024-09-12 22:54:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:55,426 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-09-12 22:54:55,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:55,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-09-12 22:54:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:54:55,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:55,427 INFO L216 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 22:54:55,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:55,632 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:55,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1903306395, now seen corresponding path program 3 times [2024-09-12 22:54:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:55,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443258308] [2024-09-12 22:54:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:55,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-12 22:54:55,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443258308] [2024-09-12 22:54:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443258308] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060179755] [2024-09-12 22:54:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:54:55,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:55,706 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) [2024-09-12 22:54:55,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:54:55,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:54:55,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:54:55,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-12 22:54:55,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-12 22:54:55,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-12 22:54:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060179755] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:55,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:55,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-09-12 22:54:55,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233095053] [2024-09-12 22:54:55,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:55,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 22:54:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 22:54:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:54:55,918 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:56,094 INFO L93 Difference]: Finished difference Result 326 states and 387 transitions. [2024-09-12 22:54:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 22:54:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:54:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:56,098 INFO L225 Difference]: With dead ends: 326 [2024-09-12 22:54:56,101 INFO L226 Difference]: Without dead ends: 293 [2024-09-12 22:54:56,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:54:56,102 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:56,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:54:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-12 22:54:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2024-09-12 22:54:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 209 states have (on average 1.1770334928229664) internal successors, (246), 209 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2024-09-12 22:54:56,154 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 38 [2024-09-12 22:54:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:56,154 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2024-09-12 22:54:56,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:56,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2024-09-12 22:54:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-09-12 22:54:56,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:56,165 INFO L216 NwaCegarLoop]: trace histogram [96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:56,178 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 22:54:56,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-09-12 22:54:56,366 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:56,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 460573421, now seen corresponding path program 4 times [2024-09-12 22:54:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:56,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712534801] [2024-09-12 22:54:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:56,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 2573 proven. 1 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2024-09-12 22:54:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712534801] [2024-09-12 22:54:56,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712534801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122774745] [2024-09-12 22:54:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:54:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:56,670 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) [2024-09-12 22:54:56,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:54:56,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:54:56,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:54:56,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:54:56,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 1492 proven. 53 refuted. 0 times theorem prover too weak. 5245 trivial. 0 not checked. [2024-09-12 22:54:56,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 1492 proven. 53 refuted. 0 times theorem prover too weak. 5245 trivial. 0 not checked. [2024-09-12 22:54:56,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122774745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:56,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:56,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-09-12 22:54:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772675550] [2024-09-12 22:54:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:56,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:54:56,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:54:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:54:56,953 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:54:57,283 INFO L93 Difference]: Finished difference Result 1639 states and 1963 transitions. [2024-09-12 22:54:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 22:54:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2024-09-12 22:54:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:54:57,296 INFO L225 Difference]: With dead ends: 1639 [2024-09-12 22:54:57,297 INFO L226 Difference]: Without dead ends: 1433 [2024-09-12 22:54:57,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:54:57,300 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:54:57,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 90 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:54:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2024-09-12 22:54:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 969. [2024-09-12 22:54:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.133678756476684) internal successors, (1094), 965 states have internal predecessors, (1094), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1097 transitions. [2024-09-12 22:54:57,478 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1097 transitions. Word has length 212 [2024-09-12 22:54:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:54:57,478 INFO L474 AbstractCegarLoop]: Abstraction has 969 states and 1097 transitions. [2024-09-12 22:54:57,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:54:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1097 transitions. [2024-09-12 22:54:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2024-09-12 22:54:57,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:54:57,505 INFO L216 NwaCegarLoop]: trace histogram [576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:54:57,522 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 22:54:57,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:57,710 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:54:57,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:54:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -805971587, now seen corresponding path program 5 times [2024-09-12 22:54:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:54:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65573029] [2024-09-12 22:54:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:54:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:54:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:58,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:54:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:54:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 236772 backedges. 88966 proven. 1 refuted. 0 times theorem prover too weak. 147805 trivial. 0 not checked. [2024-09-12 22:54:58,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:54:58,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65573029] [2024-09-12 22:54:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65573029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:54:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894933222] [2024-09-12 22:54:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:54:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:54:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:54:58,640 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) [2024-09-12 22:54:58,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:54:58,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2024-09-12 22:54:58,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:54:58,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:54:58,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:54:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 236772 backedges. 126024 proven. 1853 refuted. 0 times theorem prover too weak. 108895 trivial. 0 not checked. [2024-09-12 22:54:59,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:54:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 236772 backedges. 126024 proven. 1853 refuted. 0 times theorem prover too weak. 108895 trivial. 0 not checked. [2024-09-12 22:54:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894933222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:54:59,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:54:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-09-12 22:54:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559230368] [2024-09-12 22:54:59,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:54:59,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:54:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:54:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:54:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:54:59,316 INFO L87 Difference]: Start difference. First operand 969 states and 1097 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:55:00,576 INFO L93 Difference]: Finished difference Result 9295 states and 10571 transitions. [2024-09-12 22:55:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 22:55:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 968 [2024-09-12 22:55:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:55:00,615 INFO L225 Difference]: With dead ends: 9295 [2024-09-12 22:55:00,616 INFO L226 Difference]: Without dead ends: 8333 [2024-09-12 22:55:00,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1953 GetRequests, 1933 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:55:00,624 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:55:00,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 80 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:55:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8333 states. [2024-09-12 22:55:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8333 to 5565. [2024-09-12 22:55:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 5561 states have (on average 1.1260564646646287) internal successors, (6262), 5561 states have internal predecessors, (6262), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 6265 transitions. [2024-09-12 22:55:01,390 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 6265 transitions. Word has length 968 [2024-09-12 22:55:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:55:01,391 INFO L474 AbstractCegarLoop]: Abstraction has 5565 states and 6265 transitions. [2024-09-12 22:55:01,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:01,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:55:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 6265 transitions. [2024-09-12 22:55:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5565 [2024-09-12 22:55:01,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:55:01,644 INFO L216 NwaCegarLoop]: trace histogram [3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:55:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:55:01,844 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:55:01,845 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:55:01,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:55:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1133091731, now seen corresponding path program 6 times [2024-09-12 22:55:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:55:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338253554] [2024-09-12 22:55:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:55:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:55:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:55:12,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:55:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:55:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8528834 backedges. 1866278 proven. 66653 refuted. 0 times theorem prover too weak. 6595903 trivial. 0 not checked. [2024-09-12 22:55:13,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:55:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338253554] [2024-09-12 22:55:13,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338253554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:55:13,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688808552] [2024-09-12 22:55:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:55:13,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:55:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:55:13,296 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) [2024-09-12 22:55:13,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:55:17,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 467 check-sat command(s) [2024-09-12 22:55:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:55:17,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 5203 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:55:17,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:55:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8528834 backedges. 1866288 proven. 66653 refuted. 0 times theorem prover too weak. 6595893 trivial. 0 not checked. [2024-09-12 22:55:19,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:55:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8528834 backedges. 1866288 proven. 66653 refuted. 0 times theorem prover too weak. 6595893 trivial. 0 not checked. [2024-09-12 22:55:19,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688808552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:55:19,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:55:19,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:55:19,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229171782] [2024-09-12 22:55:19,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:55:19,958 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:55:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:55:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:55:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:55:19,959 INFO L87 Difference]: Start difference. First operand 5565 states and 6265 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:55:21,658 INFO L93 Difference]: Finished difference Result 21472 states and 24193 transitions. [2024-09-12 22:55:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:55:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5564 [2024-09-12 22:55:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:55:21,733 INFO L225 Difference]: With dead ends: 21472 [2024-09-12 22:55:21,733 INFO L226 Difference]: Without dead ends: 16605 [2024-09-12 22:55:21,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11134 GetRequests, 11127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:55:21,747 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:55:21,747 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:55:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16605 states. [2024-09-12 22:55:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16605 to 16605. [2024-09-12 22:55:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16605 states, 16601 states have (on average 1.125112945003313) internal successors, (18678), 16601 states have internal predecessors, (18678), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16605 states to 16605 states and 18681 transitions. [2024-09-12 22:55:23,881 INFO L78 Accepts]: Start accepts. Automaton has 16605 states and 18681 transitions. Word has length 5564 [2024-09-12 22:55:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:55:23,883 INFO L474 AbstractCegarLoop]: Abstraction has 16605 states and 18681 transitions. [2024-09-12 22:55:23,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:55:23,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:55:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16605 states and 18681 transitions. [2024-09-12 22:55:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16605 [2024-09-12 22:55:25,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:55:25,440 INFO L216 NwaCegarLoop]: trace histogram [10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:55:25,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 22:55:25,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 22:55:25,641 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:55:25,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:55:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1779349907, now seen corresponding path program 7 times [2024-09-12 22:55:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:55:25,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824387213] [2024-09-12 22:55:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:55:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:55:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:56:55,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:56:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:56:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76774194 backedges. 28793431 proven. 2399453 refuted. 0 times theorem prover too weak. 45581310 trivial. 0 not checked. [2024-09-12 22:56:57,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:56:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824387213] [2024-09-12 22:56:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824387213] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:56:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719126869] [2024-09-12 22:56:57,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:56:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:56:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:56:57,391 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) [2024-09-12 22:56:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:57:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:57:03,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 43603 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:57:04,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:57:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76774194 backedges. 28793431 proven. 2399453 refuted. 0 times theorem prover too weak. 45581310 trivial. 0 not checked. [2024-09-12 22:57:10,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:57:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76774194 backedges. 28793431 proven. 2399453 refuted. 0 times theorem prover too weak. 45581310 trivial. 0 not checked. [2024-09-12 22:57:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719126869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:57:16,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:57:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:57:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874879401] [2024-09-12 22:57:16,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:57:16,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:57:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:57:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:57:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:57:16,314 INFO L87 Difference]: Start difference. First operand 16605 states and 18681 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:57:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:57:20,475 INFO L93 Difference]: Finished difference Result 62225 states and 70018 transitions. [2024-09-12 22:57:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:57:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16604 [2024-09-12 22:57:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:57:20,653 INFO L225 Difference]: With dead ends: 62225 [2024-09-12 22:57:20,654 INFO L226 Difference]: Without dead ends: 49773 [2024-09-12 22:57:20,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33214 GetRequests, 33207 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:57:20,692 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:57:20,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:57:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49773 states. [2024-09-12 22:57:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49773 to 49773. [2024-09-12 22:57:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49773 states, 49769 states have (on average 1.1249974883963914) internal successors, (55990), 49769 states have internal predecessors, (55990), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:57:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49773 states to 49773 states and 55993 transitions. [2024-09-12 22:57:25,409 INFO L78 Accepts]: Start accepts. Automaton has 49773 states and 55993 transitions. Word has length 16604 [2024-09-12 22:57:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:57:25,416 INFO L474 AbstractCegarLoop]: Abstraction has 49773 states and 55993 transitions. [2024-09-12 22:57:25,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:57:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:57:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 49773 states and 55993 transitions.