./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/loops-crafted-1/mono-crafted_1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:43:12,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:43:12,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:43:12,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:43:12,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:43:12,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:43:12,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:43:12,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:43:12,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:43:12,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:43:12,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:43:12,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:43:12,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:43:12,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:43:12,482 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:43:12,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:43:12,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:43:12,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:43:12,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:43:12,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:43:12,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:43:12,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:43:12,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:43:12,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:43:12,485 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:43:12,485 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:43:12,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:43:12,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:43:12,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:43:12,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:43:12,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:43:12,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:43:12,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:43:12,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:43:12,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:43:12,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:43:12,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:43:12,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:43:12,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:43:12,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:43:12,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:43:12,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:43:12,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:43:12,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:43:12,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:43:12,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:43:12,696 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:43:12,697 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:43:12,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-09-18 15:43:13,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:43:14,065 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:43:14,065 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-09-18 15:43:14,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/65179d611/0286dde374b4403081c6f971e841265c/FLAG90956a899 [2024-09-18 15:43:14,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/65179d611/0286dde374b4403081c6f971e841265c [2024-09-18 15:43:14,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:43:14,475 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:43:14,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:43:14,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:43:14,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:43:14,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31543fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14, skipping insertion in model container [2024-09-18 15:43:14,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,494 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:43:14,594 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/loops-crafted-1/mono-crafted_1.c[318,331] [2024-09-18 15:43:14,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:43:14,611 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:43:14,624 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/loops-crafted-1/mono-crafted_1.c[318,331] [2024-09-18 15:43:14,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:43:14,640 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:43:14,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14 WrapperNode [2024-09-18 15:43:14,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:43:14,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:43:14,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:43:14,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:43:14,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,656 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:43:14,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:43:14,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:43:14,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:43:14,657 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:43:14,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,665 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,678 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]. [2024-09-18 15:43:14,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,687 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:43:14,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:43:14,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:43:14,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:43:14,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (1/1) ... [2024-09-18 15:43:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:43:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:14,720 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) [2024-09-18 15:43:14,731 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 [2024-09-18 15:43:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:43:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:43:14,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:43:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:43:14,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:43:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:43:14,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:43:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:43:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:43:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:43:14,815 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:43:14,817 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:43:14,933 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:43:14,933 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:43:14,981 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:43:14,984 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:43:14,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:43:14 BoogieIcfgContainer [2024-09-18 15:43:14,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:43:14,991 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:43:14,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:43:14,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:43:14,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:43:14" (1/3) ... [2024-09-18 15:43:14,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1360c5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:43:14, skipping insertion in model container [2024-09-18 15:43:14,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:43:14" (2/3) ... [2024-09-18 15:43:14,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1360c5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:43:14, skipping insertion in model container [2024-09-18 15:43:14,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:43:14" (3/3) ... [2024-09-18 15:43:15,000 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2024-09-18 15:43:15,020 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:43:15,020 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:43:15,069 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:43:15,073 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;@4f6c8364, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:43:15,073 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:43:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:43:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:43:15,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:15,081 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:15,081 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:15,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash -630439525, now seen corresponding path program 1 times [2024-09-18 15:43:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837232240] [2024-09-18 15:43:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:43:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837232240] [2024-09-18 15:43:15,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837232240] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:43:15,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:43:15,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:43:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362953651] [2024-09-18 15:43:15,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:43:15,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:43:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:43:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:43:15,208 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-09-18 15:43:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:15,224 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-18 15:43:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:43:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2024-09-18 15:43:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:15,230 INFO L225 Difference]: With dead ends: 31 [2024-09-18 15:43:15,230 INFO L226 Difference]: Without dead ends: 13 [2024-09-18 15:43:15,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:43:15,234 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:15,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-18 15:43:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-18 15:43:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-09-18 15:43:15,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-09-18 15:43:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:15,255 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-09-18 15:43:15,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-09-18 15:43:15,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-09-18 15:43:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:43:15,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:15,257 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:15,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:43:15,257 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:15,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -920425119, now seen corresponding path program 1 times [2024-09-18 15:43:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077604045] [2024-09-18 15:43:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:43:15,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:15,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077604045] [2024-09-18 15:43:15,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077604045] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:43:15,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:43:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:43:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14633223] [2024-09-18 15:43:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:43:15,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:43:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:43:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:43:15,321 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-18 15:43:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:15,336 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-09-18 15:43:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:43:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2024-09-18 15:43:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:15,337 INFO L225 Difference]: With dead ends: 23 [2024-09-18 15:43:15,337 INFO L226 Difference]: Without dead ends: 15 [2024-09-18 15:43:15,337 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:43:15,338 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:15,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-18 15:43:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-18 15:43:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-09-18 15:43:15,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-09-18 15:43:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:15,345 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-09-18 15:43:15,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-18 15:43:15,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-09-18 15:43:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:43:15,347 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:15,347 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:15,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:43:15,347 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:15,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash 478481828, now seen corresponding path program 1 times [2024-09-18 15:43:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180292829] [2024-09-18 15:43:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:43:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180292829] [2024-09-18 15:43:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180292829] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:43:15,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:43:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:43:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248168794] [2024-09-18 15:43:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:43:15,419 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:43:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:43:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:43:15,420 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-18 15:43:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:15,440 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-18 15:43:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:43:15,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2024-09-18 15:43:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:15,441 INFO L225 Difference]: With dead ends: 21 [2024-09-18 15:43:15,441 INFO L226 Difference]: Without dead ends: 16 [2024-09-18 15:43:15,442 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:43:15,443 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:15,443 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-18 15:43:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-18 15:43:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-18 15:43:15,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2024-09-18 15:43:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:15,451 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-18 15:43:15,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-09-18 15:43:15,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-18 15:43:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:43:15,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:15,453 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:15,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:43:15,453 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:15,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1983572541, now seen corresponding path program 1 times [2024-09-18 15:43:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:15,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906458281] [2024-09-18 15:43:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:43:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906458281] [2024-09-18 15:43:15,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906458281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434064367] [2024-09-18 15:43:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:15,526 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) [2024-09-18 15:43:15,528 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:43:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:43:15,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:43:15,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:43:15,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434064367] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:15,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:15,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-18 15:43:15,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442072004] [2024-09-18 15:43:15,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:15,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:43:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:43:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:43:15,654 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2024-09-18 15:43:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:15,678 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-09-18 15:43:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:43:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 [2024-09-18 15:43:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:15,679 INFO L225 Difference]: With dead ends: 30 [2024-09-18 15:43:15,679 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 15:43:15,679 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:43:15,682 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:15,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 15:43:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-18 15:43:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-09-18 15:43:15,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2024-09-18 15:43:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:15,686 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-09-18 15:43:15,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2024-09-18 15:43:15,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-09-18 15:43:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:43:15,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:15,688 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:15,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:43:15,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:15,890 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1327944944, now seen corresponding path program 1 times [2024-09-18 15:43:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854866736] [2024-09-18 15:43:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:15,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854866736] [2024-09-18 15:43:15,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854866736] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805121773] [2024-09-18 15:43:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:15,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:15,960 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) [2024-09-18 15:43:15,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:43:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:15,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:43:15,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:16,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:16,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805121773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:16,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:16,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-18 15:43:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684576202] [2024-09-18 15:43:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:16,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:43:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:43:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:43:16,075 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-09-18 15:43:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:16,106 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-18 15:43:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:43:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 20 [2024-09-18 15:43:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:16,107 INFO L225 Difference]: With dead ends: 41 [2024-09-18 15:43:16,107 INFO L226 Difference]: Without dead ends: 29 [2024-09-18 15:43:16,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:43:16,108 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:16,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-18 15:43:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-18 15:43:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-09-18 15:43:16,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2024-09-18 15:43:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:16,114 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-09-18 15:43:16,114 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-09-18 15:43:16,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-09-18 15:43:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:43:16,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:16,116 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:16,128 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:43:16,319 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:16,320 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:16,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash 822240260, now seen corresponding path program 2 times [2024-09-18 15:43:16,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314588337] [2024-09-18 15:43:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:16,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:16,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314588337] [2024-09-18 15:43:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314588337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448853885] [2024-09-18 15:43:16,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:43:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:16,487 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) [2024-09-18 15:43:16,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:43:16,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:43:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:16,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:43:16,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:16,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:16,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448853885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:16,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:16,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-18 15:43:16,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018723118] [2024-09-18 15:43:16,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:16,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:43:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:43:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:43:16,689 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-09-18 15:43:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:16,732 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-09-18 15:43:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:43:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 28 [2024-09-18 15:43:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:16,734 INFO L225 Difference]: With dead ends: 57 [2024-09-18 15:43:16,734 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:43:16,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:43:16,736 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:16,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:43:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:43:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:43:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-18 15:43:16,747 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2024-09-18 15:43:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:16,747 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-18 15:43:16,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-09-18 15:43:16,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-18 15:43:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 15:43:16,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:16,750 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:16,765 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:43:16,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:43:16,953 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:16,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -632407572, now seen corresponding path program 3 times [2024-09-18 15:43:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744467483] [2024-09-18 15:43:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:17,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:43:17,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:17,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744467483] [2024-09-18 15:43:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744467483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:17,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195128760] [2024-09-18 15:43:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:43:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:17,245 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) [2024-09-18 15:43:17,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:43:17,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:43:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:17,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:43:17,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-18 15:43:17,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-18 15:43:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195128760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:17,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2024-09-18 15:43:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84789259] [2024-09-18 15:43:17,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:17,560 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:43:17,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:43:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:43:17,561 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2024-09-18 15:43:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:17,795 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-18 15:43:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:43:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 44 [2024-09-18 15:43:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:17,796 INFO L225 Difference]: With dead ends: 69 [2024-09-18 15:43:17,796 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:43:17,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:43:17,800 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:17,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:43:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:43:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-18 15:43:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-18 15:43:17,813 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2024-09-18 15:43:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:17,813 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-18 15:43:17,814 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2024-09-18 15:43:17,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-18 15:43:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-18 15:43:17,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:17,815 INFO L216 NwaCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:17,827 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:43:18,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:18,016 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:18,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash -361819703, now seen corresponding path program 4 times [2024-09-18 15:43:18,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:18,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514127364] [2024-09-18 15:43:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:18,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:18,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:18,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:18,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514127364] [2024-09-18 15:43:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514127364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:18,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281544746] [2024-09-18 15:43:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:43:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:18,413 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) [2024-09-18 15:43:18,417 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:43:18,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:43:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:18,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-18 15:43:18,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:18,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:18,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281544746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:18,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:18,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-18 15:43:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082169306] [2024-09-18 15:43:18,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:18,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-18 15:43:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-18 15:43:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:43:18,864 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2024-09-18 15:43:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:18,944 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2024-09-18 15:43:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:43:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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 50 [2024-09-18 15:43:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:18,946 INFO L225 Difference]: With dead ends: 101 [2024-09-18 15:43:18,946 INFO L226 Difference]: Without dead ends: 85 [2024-09-18 15:43:18,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:43:18,947 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:18,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:43:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-18 15:43:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-09-18 15:43:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2024-09-18 15:43:18,960 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 50 [2024-09-18 15:43:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:18,960 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2024-09-18 15:43:18,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2024-09-18 15:43:18,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2024-09-18 15:43:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-18 15:43:18,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:18,962 INFO L216 NwaCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:18,974 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:43:19,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-18 15:43:19,167 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:19,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash 715909110, now seen corresponding path program 5 times [2024-09-18 15:43:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45056525] [2024-09-18 15:43:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:19,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45056525] [2024-09-18 15:43:19,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45056525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479813375] [2024-09-18 15:43:19,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:43:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:19,989 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) [2024-09-18 15:43:19,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:43:20,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-09-18 15:43:20,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:20,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-18 15:43:20,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:20,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:21,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479813375] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:21,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:21,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-18 15:43:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113177688] [2024-09-18 15:43:21,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:21,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-18 15:43:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-18 15:43:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:43:21,377 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2024-09-18 15:43:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:21,540 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2024-09-18 15:43:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-18 15:43:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 84 [2024-09-18 15:43:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:21,541 INFO L225 Difference]: With dead ends: 169 [2024-09-18 15:43:21,542 INFO L226 Difference]: Without dead ends: 153 [2024-09-18 15:43:21,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:43:21,543 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:21,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:43:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-18 15:43:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-09-18 15:43:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2024-09-18 15:43:21,564 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 84 [2024-09-18 15:43:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:21,566 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2024-09-18 15:43:21,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2024-09-18 15:43:21,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2024-09-18 15:43:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-18 15:43:21,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:21,573 INFO L216 NwaCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:21,586 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:43:21,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:21,774 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:21,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash 466944656, now seen corresponding path program 6 times [2024-09-18 15:43:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:21,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543283946] [2024-09-18 15:43:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:21,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:24,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:43:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543283946] [2024-09-18 15:43:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543283946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990056568] [2024-09-18 15:43:24,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:43:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:24,364 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) [2024-09-18 15:43:24,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:43:24,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:43:24,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:24,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-18 15:43:24,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-18 15:43:24,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-18 15:43:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990056568] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:25,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:25,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2024-09-18 15:43:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554323503] [2024-09-18 15:43:25,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:25,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-18 15:43:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-18 15:43:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2024-09-18 15:43:25,213 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2024-09-18 15:43:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:27,243 INFO L93 Difference]: Finished difference Result 184 states and 201 transitions. [2024-09-18 15:43:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-18 15:43:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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 152 [2024-09-18 15:43:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:27,244 INFO L225 Difference]: With dead ends: 184 [2024-09-18 15:43:27,245 INFO L226 Difference]: Without dead ends: 168 [2024-09-18 15:43:27,249 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2024-09-18 15:43:27,249 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:27,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:43:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-18 15:43:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2024-09-18 15:43:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2024-09-18 15:43:27,263 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2024-09-18 15:43:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:27,263 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2024-09-18 15:43:27,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2024-09-18 15:43:27,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2024-09-18 15:43:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-18 15:43:27,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:27,265 INFO L216 NwaCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:27,277 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:43:27,466 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:27,466 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1364250420, now seen corresponding path program 7 times [2024-09-18 15:43:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099752335] [2024-09-18 15:43:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:30,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:43:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099752335] [2024-09-18 15:43:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099752335] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691246635] [2024-09-18 15:43:30,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:43:30,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:30,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:30,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:43:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:30,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-18 15:43:30,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:43:30,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:43:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691246635] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:34,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:34,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-09-18 15:43:34,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430430573] [2024-09-18 15:43:34,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:34,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-09-18 15:43:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-09-18 15:43:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-18 15:43:34,566 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2024-09-18 15:43:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:34,893 INFO L93 Difference]: Finished difference Result 323 states and 398 transitions. [2024-09-18 15:43:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-18 15:43:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 161 [2024-09-18 15:43:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:34,895 INFO L225 Difference]: With dead ends: 323 [2024-09-18 15:43:34,895 INFO L226 Difference]: Without dead ends: 300 [2024-09-18 15:43:34,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-18 15:43:34,897 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:34,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:43:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-09-18 15:43:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2024-09-18 15:43:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2024-09-18 15:43:34,920 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 161 [2024-09-18 15:43:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:34,921 INFO L474 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2024-09-18 15:43:34,921 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2024-09-18 15:43:34,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2024-09-18 15:43:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2024-09-18 15:43:34,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:34,924 INFO L216 NwaCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:34,937 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:43:35,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:35,125 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2052291453, now seen corresponding path program 8 times [2024-09-18 15:43:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:35,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349652760] [2024-09-18 15:43:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:35,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:45,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:43:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349652760] [2024-09-18 15:43:45,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349652760] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477668334] [2024-09-18 15:43:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:43:45,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:45,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:45,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:45,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:43:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:43:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:45,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-09-18 15:43:45,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:43:45,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:44:02,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477668334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:02,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:02,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-09-18 15:44:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894506392] [2024-09-18 15:44:02,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:02,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-09-18 15:44:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-09-18 15:44:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-18 15:44:02,239 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2024-09-18 15:44:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:03,239 INFO L93 Difference]: Finished difference Result 599 states and 743 transitions. [2024-09-18 15:44:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-09-18 15:44:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 299 [2024-09-18 15:44:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:03,242 INFO L225 Difference]: With dead ends: 599 [2024-09-18 15:44:03,242 INFO L226 Difference]: Without dead ends: 576 [2024-09-18 15:44:03,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-18 15:44:03,245 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:03,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:44:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-18 15:44:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2024-09-18 15:44:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:44:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 579 transitions. [2024-09-18 15:44:03,287 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 579 transitions. Word has length 299 [2024-09-18 15:44:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:03,287 INFO L474 AbstractCegarLoop]: Abstraction has 576 states and 579 transitions. [2024-09-18 15:44:03,288 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2024-09-18 15:44:03,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 579 transitions. [2024-09-18 15:44:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2024-09-18 15:44:03,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:03,294 INFO L216 NwaCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:03,310 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:44:03,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:44:03,499 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:03,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1416607007, now seen corresponding path program 9 times [2024-09-18 15:44:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627042909] [2024-09-18 15:44:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:58,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 15:44:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627042909] [2024-09-18 15:44:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627042909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428345734] [2024-09-18 15:44:58,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:44:58,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:58,046 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:58,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:44:58,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:44:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:58,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:44:58,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2024-09-18 15:44:58,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2024-09-18 15:44:59,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428345734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:59,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:59,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2024-09-18 15:44:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206671903] [2024-09-18 15:44:59,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:59,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2024-09-18 15:44:59,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2024-09-18 15:44:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-18 15:44:59,253 INFO L87 Difference]: Start difference. First operand 576 states and 579 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2024-09-18 15:45:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:00,633 INFO L93 Difference]: Finished difference Result 609 states and 624 transitions. [2024-09-18 15:45:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2024-09-18 15:45:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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 575 [2024-09-18 15:45:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:00,637 INFO L225 Difference]: With dead ends: 609 [2024-09-18 15:45:00,637 INFO L226 Difference]: Without dead ends: 586 [2024-09-18 15:45:00,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-18 15:45:00,640 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:00,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:45:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-18 15:45:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2024-09-18 15:45:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.0137693631669535) internal successors, (589), 581 states have internal predecessors, (589), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 593 transitions. [2024-09-18 15:45:00,681 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 593 transitions. Word has length 575 [2024-09-18 15:45:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:00,682 INFO L474 AbstractCegarLoop]: Abstraction has 586 states and 593 transitions. [2024-09-18 15:45:00,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2024-09-18 15:45:00,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 593 transitions. [2024-09-18 15:45:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2024-09-18 15:45:00,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:00,688 INFO L216 NwaCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:00,700 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:00,888 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:45:00,888 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:00,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 114891320, now seen corresponding path program 10 times [2024-09-18 15:45:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:00,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586941248] [2024-09-18 15:45:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:57,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-18 15:45:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586941248] [2024-09-18 15:45:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586941248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056492941] [2024-09-18 15:45:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:45:57,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:57,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:57,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:45:58,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:45:58,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:58,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 552 conjuncts are in the unsatisfiable core [2024-09-18 15:45:58,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-18 15:45:58,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-18 15:47:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056492941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:05,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2024-09-18 15:47:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217936547] [2024-09-18 15:47:05,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:05,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2024-09-18 15:47:05,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2024-09-18 15:47:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-18 15:47:05,462 INFO L87 Difference]: Start difference. First operand 586 states and 593 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2024-09-18 15:47:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:14,174 INFO L93 Difference]: Finished difference Result 1171 states and 1462 transitions. [2024-09-18 15:47:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-09-18 15:47:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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 585 [2024-09-18 15:47:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:14,186 INFO L225 Difference]: With dead ends: 1171 [2024-09-18 15:47:14,186 INFO L226 Difference]: Without dead ends: 1140 [2024-09-18 15:47:14,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-18 15:47:14,203 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:14,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:47:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2024-09-18 15:47:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2024-09-18 15:47:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1135 states have (on average 1.0070484581497798) internal successors, (1143), 1135 states have internal predecessors, (1143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:47:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1147 transitions. [2024-09-18 15:47:14,331 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1147 transitions. Word has length 585 [2024-09-18 15:47:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:14,331 INFO L474 AbstractCegarLoop]: Abstraction has 1140 states and 1147 transitions. [2024-09-18 15:47:14,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2024-09-18 15:47:14,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1147 transitions. [2024-09-18 15:47:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2024-09-18 15:47:14,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:14,339 INFO L216 NwaCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:14,354 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:47:14,543 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:47:14,543 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -313845513, now seen corresponding path program 11 times [2024-09-18 15:47:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283824409] [2024-09-18 15:47:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat