./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.i --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 04d6fb36 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-invgen/heapsort.i -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 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:42:15,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:42:15,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:42:15,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:42:15,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:42:16,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:42:16,017 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:42:16,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:42:16,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:42:16,020 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:42:16,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:42:16,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:42:16,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:42:16,023 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:42:16,023 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:42:16,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:42:16,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:42:16,024 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:42:16,024 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:42:16,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:42:16,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:42:16,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:42:16,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:42:16,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:42:16,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:42:16,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:42:16,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:42:16,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:42:16,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:42:16,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:42:16,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:42:16,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:42:16,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:42:16,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:42:16,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:42:16,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:42:16,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:42:16,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:42:16,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:42:16,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:42:16,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:42:16,320 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:42:16,321 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:42:16,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-15 18:42:17,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:42:17,783 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:42:17,783 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-15 18:42:17,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e4481207a/869bf19b72ac41838ee162d5507f39ef/FLAG3ec3538e3 [2024-09-15 18:42:18,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e4481207a/869bf19b72ac41838ee162d5507f39ef [2024-09-15 18:42:18,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:42:18,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:42:18,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:42:18,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:42:18,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:42:18,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172c01f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,215 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:42:18,337 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2024-09-15 18:42:18,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:42:18,369 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:42:18,379 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2024-09-15 18:42:18,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:42:18,398 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:42:18,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18 WrapperNode [2024-09-15 18:42:18,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:42:18,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:42:18,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:42:18,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:42:18,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,435 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:42:18,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:42:18,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:42:18,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:42:18,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:42:18,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,454 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,466 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]. [2024-09-15 18:42:18,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,481 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:42:18,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:42:18,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:42:18,482 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:42:18,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:42:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:18,513 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) [2024-09-15 18:42:18,522 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 [2024-09-15 18:42:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:42:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:42:18,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:42:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:42:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:42:18,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:42:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:42:18,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:42:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:42:18,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:42:18,625 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:42:18,627 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:42:18,787 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-15 18:42:18,787 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:42:18,809 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:42:18,810 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 18:42:18,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:42:18 BoogieIcfgContainer [2024-09-15 18:42:18,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:42:18,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:42:18,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:42:18,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:42:18,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:42:18" (1/3) ... [2024-09-15 18:42:18,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595b4829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (2/3) ... [2024-09-15 18:42:18,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595b4829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:42:18" (3/3) ... [2024-09-15 18:42:18,818 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2024-09-15 18:42:18,832 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:42:18,832 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:42:18,878 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:42:18,885 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;@3b5fb29e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:42:18,885 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:42:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 18:42:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:42:18,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:18,896 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:18,897 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:18,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 855475308, now seen corresponding path program 1 times [2024-09-15 18:42:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832918767] [2024-09-15 18:42:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832918767] [2024-09-15 18:42:19,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832918767] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:19,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:19,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 18:42:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577579045] [2024-09-15 18:42:19,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:19,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:42:19,236 INFO L87 Difference]: Start difference. First operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:19,455 INFO L93 Difference]: Finished difference Result 113 states and 211 transitions. [2024-09-15 18:42:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 18:42:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:19,464 INFO L225 Difference]: With dead ends: 113 [2024-09-15 18:42:19,464 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 18:42:19,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:42:19,469 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:19,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 293 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 18:42:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-15 18:42:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 18:42:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 91 transitions. [2024-09-15 18:42:19,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 91 transitions. Word has length 14 [2024-09-15 18:42:19,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:19,516 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 91 transitions. [2024-09-15 18:42:19,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 91 transitions. [2024-09-15 18:42:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:42:19,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:19,518 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:19,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:42:19,519 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:19,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash 843231207, now seen corresponding path program 1 times [2024-09-15 18:42:19,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:19,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978502882] [2024-09-15 18:42:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:19,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978502882] [2024-09-15 18:42:19,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978502882] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:19,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:19,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 18:42:19,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752293422] [2024-09-15 18:42:19,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:19,660 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:42:19,662 INFO L87 Difference]: Start difference. First operand 59 states and 91 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:19,839 INFO L93 Difference]: Finished difference Result 117 states and 183 transitions. [2024-09-15 18:42:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 18:42:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:19,842 INFO L225 Difference]: With dead ends: 117 [2024-09-15 18:42:19,843 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 18:42:19,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:42:19,845 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:19,846 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 18:42:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-15 18:42:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 48 states have call successors, (48), 6 states have call predecessors, (48), 5 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-15 18:42:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 167 transitions. [2024-09-15 18:42:19,878 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 167 transitions. Word has length 14 [2024-09-15 18:42:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:19,878 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 167 transitions. [2024-09-15 18:42:19,878 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:19,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 167 transitions. [2024-09-15 18:42:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:42:19,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:19,881 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:19,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:42:19,881 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:19,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 842919880, now seen corresponding path program 1 times [2024-09-15 18:42:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:19,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729338376] [2024-09-15 18:42:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729338376] [2024-09-15 18:42:19,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729338376] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:19,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:19,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 18:42:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923459004] [2024-09-15 18:42:19,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:19,996 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:42:19,997 INFO L87 Difference]: Start difference. First operand 106 states and 167 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:20,176 INFO L93 Difference]: Finished difference Result 161 states and 257 transitions. [2024-09-15 18:42:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:42:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-15 18:42:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:20,182 INFO L225 Difference]: With dead ends: 161 [2024-09-15 18:42:20,182 INFO L226 Difference]: Without dead ends: 159 [2024-09-15 18:42:20,183 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:42:20,186 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:20,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-15 18:42:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-09-15 18:42:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 63 states have (on average 1.380952380952381) internal successors, (87), 67 states have internal predecessors, (87), 72 states have call successors, (72), 7 states have call predecessors, (72), 6 states have return successors, (71), 67 states have call predecessors, (71), 71 states have call successors, (71) [2024-09-15 18:42:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2024-09-15 18:42:20,227 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 19 [2024-09-15 18:42:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:20,228 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2024-09-15 18:42:20,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2024-09-15 18:42:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:42:20,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:20,230 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:20,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:42:20,230 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:20,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash 303375166, now seen corresponding path program 1 times [2024-09-15 18:42:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:20,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862753516] [2024-09-15 18:42:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862753516] [2024-09-15 18:42:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862753516] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502517951] [2024-09-15 18:42:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:20,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:20,334 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:20,539 INFO L93 Difference]: Finished difference Result 208 states and 342 transitions. [2024-09-15 18:42:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-15 18:42:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:20,549 INFO L225 Difference]: With dead ends: 208 [2024-09-15 18:42:20,549 INFO L226 Difference]: Without dead ends: 206 [2024-09-15 18:42:20,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:42:20,551 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:20,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-15 18:42:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-09-15 18:42:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 94 states have internal predecessors, (122), 108 states have call successors, (108), 8 states have call predecessors, (108), 7 states have return successors, (107), 100 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-15 18:42:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 337 transitions. [2024-09-15 18:42:20,599 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 337 transitions. Word has length 19 [2024-09-15 18:42:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:20,599 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 337 transitions. [2024-09-15 18:42:20,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 337 transitions. [2024-09-15 18:42:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:42:20,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:20,601 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:20,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 18:42:20,601 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -283430848, now seen corresponding path program 1 times [2024-09-15 18:42:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8816846] [2024-09-15 18:42:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8816846] [2024-09-15 18:42:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8816846] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:20,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:20,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:42:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611601570] [2024-09-15 18:42:20,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:20,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:42:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:42:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:42:20,635 INFO L87 Difference]: Start difference. First operand 203 states and 337 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:20,733 INFO L93 Difference]: Finished difference Result 387 states and 649 transitions. [2024-09-15 18:42:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:42:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-15 18:42:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:20,737 INFO L225 Difference]: With dead ends: 387 [2024-09-15 18:42:20,737 INFO L226 Difference]: Without dead ends: 305 [2024-09-15 18:42:20,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:42:20,741 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:20,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:42:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-15 18:42:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 250. [2024-09-15 18:42:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 114 states have internal predecessors, (150), 136 states have call successors, (136), 8 states have call predecessors, (136), 7 states have return successors, (135), 127 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-15 18:42:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 421 transitions. [2024-09-15 18:42:20,811 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 421 transitions. Word has length 19 [2024-09-15 18:42:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:20,811 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 421 transitions. [2024-09-15 18:42:20,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:20,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 421 transitions. [2024-09-15 18:42:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:42:20,816 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:20,816 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:20,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 18:42:20,817 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1858602097, now seen corresponding path program 1 times [2024-09-15 18:42:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766254720] [2024-09-15 18:42:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:20,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766254720] [2024-09-15 18:42:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766254720] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:20,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 18:42:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856503651] [2024-09-15 18:42:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:20,914 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:42:20,914 INFO L87 Difference]: Start difference. First operand 250 states and 421 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:42:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:21,063 INFO L93 Difference]: Finished difference Result 338 states and 568 transitions. [2024-09-15 18:42:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-15 18:42:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:21,066 INFO L225 Difference]: With dead ends: 338 [2024-09-15 18:42:21,066 INFO L226 Difference]: Without dead ends: 336 [2024-09-15 18:42:21,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:42:21,067 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:21,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 248 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-15 18:42:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-09-15 18:42:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 132 states have (on average 1.4242424242424243) internal successors, (188), 146 states have internal predecessors, (188), 162 states have call successors, (162), 10 states have call predecessors, (162), 9 states have return successors, (161), 147 states have call predecessors, (161), 161 states have call successors, (161) [2024-09-15 18:42:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 511 transitions. [2024-09-15 18:42:21,142 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 511 transitions. Word has length 26 [2024-09-15 18:42:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:21,142 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 511 transitions. [2024-09-15 18:42:21,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:42:21,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 511 transitions. [2024-09-15 18:42:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:42:21,144 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:21,144 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:21,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 18:42:21,144 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:21,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1261754835, now seen corresponding path program 1 times [2024-09-15 18:42:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:21,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557797722] [2024-09-15 18:42:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:21,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:21,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:21,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557797722] [2024-09-15 18:42:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557797722] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:21,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:21,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 18:42:21,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160870223] [2024-09-15 18:42:21,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:21,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:42:21,228 INFO L87 Difference]: Start difference. First operand 304 states and 511 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:21,417 INFO L93 Difference]: Finished difference Result 370 states and 611 transitions. [2024-09-15 18:42:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:42:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-15 18:42:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:21,420 INFO L225 Difference]: With dead ends: 370 [2024-09-15 18:42:21,420 INFO L226 Difference]: Without dead ends: 368 [2024-09-15 18:42:21,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:42:21,422 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:21,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 251 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-15 18:42:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2024-09-15 18:42:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 146 states have (on average 1.4109589041095891) internal successors, (206), 164 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-15 18:42:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 577 transitions. [2024-09-15 18:42:21,483 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 577 transitions. Word has length 29 [2024-09-15 18:42:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:21,484 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 577 transitions. [2024-09-15 18:42:21,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:21,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 577 transitions. [2024-09-15 18:42:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:42:21,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:21,488 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:21,488 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 18:42:21,488 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:21,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,489 INFO L85 PathProgramCache]: Analyzing trace with hash 887335745, now seen corresponding path program 1 times [2024-09-15 18:42:21,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:21,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047951645] [2024-09-15 18:42:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:21,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:21,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:21,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047951645] [2024-09-15 18:42:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047951645] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:21,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:42:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902898525] [2024-09-15 18:42:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:21,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:42:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:42:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:42:21,568 INFO L87 Difference]: Start difference. First operand 344 states and 577 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:42:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:21,823 INFO L93 Difference]: Finished difference Result 795 states and 1334 transitions. [2024-09-15 18:42:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-15 18:42:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:21,828 INFO L225 Difference]: With dead ends: 795 [2024-09-15 18:42:21,829 INFO L226 Difference]: Without dead ends: 540 [2024-09-15 18:42:21,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:21,830 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:21,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 183 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-15 18:42:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 345. [2024-09-15 18:42:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 147 states have (on average 1.401360544217687) internal successors, (206), 165 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-15 18:42:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 577 transitions. [2024-09-15 18:42:21,897 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 577 transitions. Word has length 28 [2024-09-15 18:42:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:21,898 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 577 transitions. [2024-09-15 18:42:21,898 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:42:21,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 577 transitions. [2024-09-15 18:42:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:42:21,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:21,900 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:21,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-15 18:42:21,901 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:21,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash 969267811, now seen corresponding path program 1 times [2024-09-15 18:42:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186944560] [2024-09-15 18:42:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:42:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:22,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186944560] [2024-09-15 18:42:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186944560] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046468857] [2024-09-15 18:42:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:22,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:22,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:22,002 INFO L87 Difference]: Start difference. First operand 345 states and 577 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:22,232 INFO L93 Difference]: Finished difference Result 542 states and 924 transitions. [2024-09-15 18:42:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-15 18:42:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:22,236 INFO L225 Difference]: With dead ends: 542 [2024-09-15 18:42:22,236 INFO L226 Difference]: Without dead ends: 540 [2024-09-15 18:42:22,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:42:22,238 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:22,239 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-15 18:42:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 492. [2024-09-15 18:42:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 202 states have (on average 1.4306930693069306) internal successors, (289), 232 states have internal predecessors, (289), 277 states have call successors, (277), 13 states have call predecessors, (277), 12 states have return successors, (276), 246 states have call predecessors, (276), 276 states have call successors, (276) [2024-09-15 18:42:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 842 transitions. [2024-09-15 18:42:22,336 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 842 transitions. Word has length 31 [2024-09-15 18:42:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:22,337 INFO L474 AbstractCegarLoop]: Abstraction has 492 states and 842 transitions. [2024-09-15 18:42:22,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:22,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 842 transitions. [2024-09-15 18:42:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:42:22,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:22,339 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:22,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-15 18:42:22,339 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:22,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1109816421, now seen corresponding path program 1 times [2024-09-15 18:42:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643653662] [2024-09-15 18:42:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:42:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:22,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643653662] [2024-09-15 18:42:22,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643653662] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:22,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:22,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:22,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416066417] [2024-09-15 18:42:22,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:22,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:22,443 INFO L87 Difference]: Start difference. First operand 492 states and 842 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:22,654 INFO L93 Difference]: Finished difference Result 562 states and 954 transitions. [2024-09-15 18:42:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:42:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-15 18:42:22,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:22,660 INFO L225 Difference]: With dead ends: 562 [2024-09-15 18:42:22,660 INFO L226 Difference]: Without dead ends: 560 [2024-09-15 18:42:22,660 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:42:22,661 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:22,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 208 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-09-15 18:42:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2024-09-15 18:42:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 205 states have (on average 1.424390243902439) internal successors, (292), 235 states have internal predecessors, (292), 280 states have call successors, (280), 14 states have call predecessors, (280), 13 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-15 18:42:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 851 transitions. [2024-09-15 18:42:22,759 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 851 transitions. Word has length 31 [2024-09-15 18:42:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:22,759 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 851 transitions. [2024-09-15 18:42:22,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:42:22,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 851 transitions. [2024-09-15 18:42:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:42:22,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:22,762 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:22,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-15 18:42:22,762 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:22,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529802, now seen corresponding path program 1 times [2024-09-15 18:42:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385907554] [2024-09-15 18:42:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:42:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 18:42:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385907554] [2024-09-15 18:42:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385907554] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:22,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5899733] [2024-09-15 18:42:22,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:22,855 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:22,856 INFO L87 Difference]: Start difference. First operand 499 states and 851 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-15 18:42:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:23,081 INFO L93 Difference]: Finished difference Result 557 states and 928 transitions. [2024-09-15 18:42:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2024-09-15 18:42:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:23,086 INFO L225 Difference]: With dead ends: 557 [2024-09-15 18:42:23,086 INFO L226 Difference]: Without dead ends: 555 [2024-09-15 18:42:23,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:42:23,087 INFO L434 NwaCegarLoop]: 70 mSDtfsCounter, 35 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:23,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 259 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-15 18:42:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 503. [2024-09-15 18:42:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 208 states have (on average 1.4182692307692308) internal successors, (295), 238 states have internal predecessors, (295), 280 states have call successors, (280), 15 states have call predecessors, (280), 14 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-15 18:42:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 854 transitions. [2024-09-15 18:42:23,202 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 854 transitions. Word has length 41 [2024-09-15 18:42:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:23,204 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 854 transitions. [2024-09-15 18:42:23,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-15 18:42:23,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 854 transitions. [2024-09-15 18:42:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:42:23,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:23,206 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:23,206 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-15 18:42:23,206 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:23,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2122421222, now seen corresponding path program 1 times [2024-09-15 18:42:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809366078] [2024-09-15 18:42:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:23,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:42:23,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:23,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809366078] [2024-09-15 18:42:23,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809366078] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:23,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:23,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:23,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927622609] [2024-09-15 18:42:23,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:23,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:23,291 INFO L87 Difference]: Start difference. First operand 503 states and 854 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 18:42:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:23,521 INFO L93 Difference]: Finished difference Result 534 states and 893 transitions. [2024-09-15 18:42:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:42:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-09-15 18:42:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:23,526 INFO L225 Difference]: With dead ends: 534 [2024-09-15 18:42:23,526 INFO L226 Difference]: Without dead ends: 532 [2024-09-15 18:42:23,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:42:23,527 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:23,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-15 18:42:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2024-09-15 18:42:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 214 states have (on average 1.4065420560747663) internal successors, (301), 244 states have internal predecessors, (301), 280 states have call successors, (280), 17 states have call predecessors, (280), 16 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-15 18:42:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 860 transitions. [2024-09-15 18:42:23,616 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 860 transitions. Word has length 41 [2024-09-15 18:42:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:23,617 INFO L474 AbstractCegarLoop]: Abstraction has 511 states and 860 transitions. [2024-09-15 18:42:23,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 18:42:23,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 860 transitions. [2024-09-15 18:42:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:42:23,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:23,618 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:23,618 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-15 18:42:23,618 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:23,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 290316784, now seen corresponding path program 1 times [2024-09-15 18:42:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395697518] [2024-09-15 18:42:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:42:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 18:42:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395697518] [2024-09-15 18:42:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395697518] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:23,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:23,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40473679] [2024-09-15 18:42:23,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:23,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:23,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:23,687 INFO L87 Difference]: Start difference. First operand 511 states and 860 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 18:42:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:23,866 INFO L93 Difference]: Finished difference Result 578 states and 966 transitions. [2024-09-15 18:42:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:42:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-09-15 18:42:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:23,871 INFO L225 Difference]: With dead ends: 578 [2024-09-15 18:42:23,872 INFO L226 Difference]: Without dead ends: 576 [2024-09-15 18:42:23,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:42:23,873 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:23,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-15 18:42:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 515. [2024-09-15 18:42:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 217 states have (on average 1.400921658986175) internal successors, (304), 247 states have internal predecessors, (304), 280 states have call successors, (280), 18 states have call predecessors, (280), 17 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-15 18:42:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 863 transitions. [2024-09-15 18:42:23,998 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 863 transitions. Word has length 53 [2024-09-15 18:42:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:23,998 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 863 transitions. [2024-09-15 18:42:23,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 18:42:23,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 863 transitions. [2024-09-15 18:42:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:42:24,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:24,000 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:24,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-15 18:42:24,001 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:24,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash 822747500, now seen corresponding path program 1 times [2024-09-15 18:42:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:24,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014357616] [2024-09-15 18:42:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:42:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:42:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 18:42:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:42:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-15 18:42:24,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014357616] [2024-09-15 18:42:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014357616] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154106354] [2024-09-15 18:42:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:24,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:24,059 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) [2024-09-15 18:42:24,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:42:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:42:24,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-15 18:42:24,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:42:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154106354] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:24,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:42:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-09-15 18:42:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370713200] [2024-09-15 18:42:24,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:24,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:42:24,226 INFO L87 Difference]: Start difference. First operand 515 states and 863 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 18:42:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:24,446 INFO L93 Difference]: Finished difference Result 932 states and 1539 transitions. [2024-09-15 18:42:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:42:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2024-09-15 18:42:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:24,450 INFO L225 Difference]: With dead ends: 932 [2024-09-15 18:42:24,451 INFO L226 Difference]: Without dead ends: 476 [2024-09-15 18:42:24,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:42:24,453 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:24,453 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 216 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-15 18:42:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 446. [2024-09-15 18:42:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 196 states have (on average 1.3673469387755102) internal successors, (268), 220 states have internal predecessors, (268), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 207 states have call predecessors, (231), 231 states have call successors, (231) [2024-09-15 18:42:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 731 transitions. [2024-09-15 18:42:24,584 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 731 transitions. Word has length 61 [2024-09-15 18:42:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:24,584 INFO L474 AbstractCegarLoop]: Abstraction has 446 states and 731 transitions. [2024-09-15 18:42:24,584 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-15 18:42:24,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 731 transitions. [2024-09-15 18:42:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 18:42:24,586 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:24,587 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:24,600 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:42:24,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 18:42:24,791 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:24,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash 968879790, now seen corresponding path program 1 times [2024-09-15 18:42:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783502148] [2024-09-15 18:42:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:42:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 18:42:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:42:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:42:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 18:42:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 18:42:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:42:24,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783502148] [2024-09-15 18:42:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783502148] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633043183] [2024-09-15 18:42:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:24,906 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) [2024-09-15 18:42:24,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:42:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 18:42:24,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-15 18:42:25,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:42:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633043183] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:25,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:42:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-15 18:42:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242612135] [2024-09-15 18:42:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:25,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:42:25,146 INFO L87 Difference]: Start difference. First operand 446 states and 731 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-15 18:42:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:25,464 INFO L93 Difference]: Finished difference Result 813 states and 1310 transitions. [2024-09-15 18:42:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 18:42:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2024-09-15 18:42:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:25,467 INFO L225 Difference]: With dead ends: 813 [2024-09-15 18:42:25,468 INFO L226 Difference]: Without dead ends: 375 [2024-09-15 18:42:25,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:42:25,472 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:25,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:42:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-09-15 18:42:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2024-09-15 18:42:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 155 states have (on average 1.3290322580645162) internal successors, (206), 171 states have internal predecessors, (206), 168 states have call successors, (168), 17 states have call predecessors, (168), 16 states have return successors, (167), 151 states have call predecessors, (167), 167 states have call successors, (167) [2024-09-15 18:42:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 541 transitions. [2024-09-15 18:42:25,540 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 541 transitions. Word has length 83 [2024-09-15 18:42:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:25,540 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 541 transitions. [2024-09-15 18:42:25,540 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-15 18:42:25,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 541 transitions. [2024-09-15 18:42:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 18:42:25,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:25,542 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:25,555 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:25,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 18:42:25,743 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:25,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747476, now seen corresponding path program 1 times [2024-09-15 18:42:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:25,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647611182] [2024-09-15 18:42:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:42:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 18:42:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:42:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:42:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 18:42:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 18:42:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:42:25,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647611182] [2024-09-15 18:42:25,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647611182] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426376029] [2024-09-15 18:42:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:25,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:25,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:25,850 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) [2024-09-15 18:42:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:42:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:42:25,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-15 18:42:26,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:42:26,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426376029] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:26,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:42:26,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-15 18:42:26,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723891163] [2024-09-15 18:42:26,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:26,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:42:26,021 INFO L87 Difference]: Start difference. First operand 340 states and 541 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-15 18:42:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:26,220 INFO L93 Difference]: Finished difference Result 639 states and 1012 transitions. [2024-09-15 18:42:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2024-09-15 18:42:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:26,223 INFO L225 Difference]: With dead ends: 639 [2024-09-15 18:42:26,223 INFO L226 Difference]: Without dead ends: 293 [2024-09-15 18:42:26,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:42:26,224 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:26,224 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 183 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-15 18:42:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2024-09-15 18:42:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 144 states have internal predecessors, (170), 136 states have call successors, (136), 17 states have call predecessors, (136), 16 states have return successors, (135), 121 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-15 18:42:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 441 transitions. [2024-09-15 18:42:26,270 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 441 transitions. Word has length 83 [2024-09-15 18:42:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:26,271 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 441 transitions. [2024-09-15 18:42:26,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-15 18:42:26,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 441 transitions. [2024-09-15 18:42:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-15 18:42:26,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:26,274 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:26,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:42:26,475 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 18:42:26,475 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:26,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -680780915, now seen corresponding path program 1 times [2024-09-15 18:42:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769699603] [2024-09-15 18:42:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:42:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:42:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:42:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:42:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 18:42:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 18:42:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-09-15 18:42:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769699603] [2024-09-15 18:42:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769699603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747944907] [2024-09-15 18:42:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:26,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:26,560 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) [2024-09-15 18:42:26,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:42:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:26,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 18:42:26,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-15 18:42:26,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2024-09-15 18:42:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747944907] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:26,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-15 18:42:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243423055] [2024-09-15 18:42:26,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:26,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:42:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:42:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:42:26,771 INFO L87 Difference]: Start difference. First operand 283 states and 441 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-15 18:42:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:27,580 INFO L93 Difference]: Finished difference Result 571 states and 876 transitions. [2024-09-15 18:42:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:42:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 88 [2024-09-15 18:42:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:27,583 INFO L225 Difference]: With dead ends: 571 [2024-09-15 18:42:27,583 INFO L226 Difference]: Without dead ends: 343 [2024-09-15 18:42:27,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 18:42:27,584 INFO L434 NwaCegarLoop]: 158 mSDtfsCounter, 205 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:27,584 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 731 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:42:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-15 18:42:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 237. [2024-09-15 18:42:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 127 states have internal predecessors, (146), 102 states have call successors, (102), 17 states have call predecessors, (102), 16 states have return successors, (101), 92 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-15 18:42:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2024-09-15 18:42:27,629 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 88 [2024-09-15 18:42:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:27,629 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2024-09-15 18:42:27,629 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-15 18:42:27,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2024-09-15 18:42:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-15 18:42:27,630 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:27,630 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:27,646 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:42:27,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:27,835 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:27,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1903110671, now seen corresponding path program 1 times [2024-09-15 18:42:27,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:27,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836515552] [2024-09-15 18:42:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:42:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:42:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:42:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:42:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:42:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:42:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 18:42:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-15 18:42:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 18:42:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:42:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:42:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836515552] [2024-09-15 18:42:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836515552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516390177] [2024-09-15 18:42:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:27,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:27,956 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) [2024-09-15 18:42:27,957 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:42:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:42:28,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-15 18:42:28,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:42:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516390177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:28,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:28,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-15 18:42:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803631797] [2024-09-15 18:42:28,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:28,329 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:42:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:42:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:42:28,330 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-15 18:42:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:30,132 INFO L93 Difference]: Finished difference Result 800 states and 1252 transitions. [2024-09-15 18:42:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-15 18:42:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) Word has length 110 [2024-09-15 18:42:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:30,136 INFO L225 Difference]: With dead ends: 800 [2024-09-15 18:42:30,136 INFO L226 Difference]: Without dead ends: 469 [2024-09-15 18:42:30,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2024-09-15 18:42:30,139 INFO L434 NwaCegarLoop]: 156 mSDtfsCounter, 371 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:30,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1097 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 18:42:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-09-15 18:42:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 372. [2024-09-15 18:42:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 173 states have (on average 1.2658959537572254) internal successors, (219), 187 states have internal predecessors, (219), 182 states have call successors, (182), 17 states have call predecessors, (182), 16 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-15 18:42:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 582 transitions. [2024-09-15 18:42:30,245 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 582 transitions. Word has length 110 [2024-09-15 18:42:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:30,245 INFO L474 AbstractCegarLoop]: Abstraction has 372 states and 582 transitions. [2024-09-15 18:42:30,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-15 18:42:30,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 582 transitions. [2024-09-15 18:42:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-15 18:42:30,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:30,247 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:30,262 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:42:30,447 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 18:42:30,448 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:30,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -853516595, now seen corresponding path program 1 times [2024-09-15 18:42:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:30,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439629586] [2024-09-15 18:42:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:42:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:42:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:42:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:42:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:42:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:42:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 18:42:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-15 18:42:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 18:42:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:42:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:42:30,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439629586] [2024-09-15 18:42:30,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439629586] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495634897] [2024-09-15 18:42:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:30,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:30,593 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) [2024-09-15 18:42:30,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:42:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:42:30,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:42:30,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:42:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495634897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:30,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:30,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-15 18:42:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857661957] [2024-09-15 18:42:30,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:30,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:42:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:42:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:42:30,816 INFO L87 Difference]: Start difference. First operand 372 states and 582 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-15 18:42:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:31,144 INFO L93 Difference]: Finished difference Result 434 states and 675 transitions. [2024-09-15 18:42:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 18:42:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 110 [2024-09-15 18:42:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:31,150 INFO L225 Difference]: With dead ends: 434 [2024-09-15 18:42:31,150 INFO L226 Difference]: Without dead ends: 432 [2024-09-15 18:42:31,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:42:31,151 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:31,151 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 394 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:42:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-09-15 18:42:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 376. [2024-09-15 18:42:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 176 states have (on average 1.2613636363636365) internal successors, (222), 190 states have internal predecessors, (222), 182 states have call successors, (182), 18 states have call predecessors, (182), 17 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-15 18:42:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2024-09-15 18:42:31,240 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 110 [2024-09-15 18:42:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:31,240 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2024-09-15 18:42:31,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-15 18:42:31,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2024-09-15 18:42:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-15 18:42:31,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:31,242 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:31,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:42:31,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:31,443 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:31,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1133746567, now seen corresponding path program 2 times [2024-09-15 18:42:31,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:31,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742609604] [2024-09-15 18:42:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:42:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:42:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:42:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:42:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:42:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:42:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 18:42:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-15 18:42:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 18:42:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:42:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-15 18:42:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-09-15 18:42:31,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:31,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742609604] [2024-09-15 18:42:31,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742609604] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:31,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901460931] [2024-09-15 18:42:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:42:31,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:31,557 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) [2024-09-15 18:42:31,558 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:42:31,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:42:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:31,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 18:42:31,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-15 18:42:31,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-15 18:42:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901460931] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:31,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:31,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2024-09-15 18:42:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591731671] [2024-09-15 18:42:31,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:31,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 18:42:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 18:42:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:42:31,937 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-15 18:42:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:32,905 INFO L93 Difference]: Finished difference Result 698 states and 1108 transitions. [2024-09-15 18:42:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:42:32,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) Word has length 115 [2024-09-15 18:42:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:32,907 INFO L225 Difference]: With dead ends: 698 [2024-09-15 18:42:32,907 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 18:42:32,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 18:42:32,911 INFO L434 NwaCegarLoop]: 78 mSDtfsCounter, 281 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:32,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 586 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:42:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 18:42:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 18:42:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 18:42:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 18:42:32,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2024-09-15 18:42:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:32,912 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 18:42:32,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-15 18:42:32,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 18:42:32,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 18:42:32,915 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 18:42:32,928 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 18:42:33,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:33,118 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:33,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.