./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/Mono1_1-2.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 87992b509300f030a5da432e9377be19bc7547f7933c7234d13c36c34b6235c7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:28:23,220 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:28:23,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:28:23,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:28:23,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:28:23,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:28:23,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:28:23,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:28:23,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:28:23,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:28:23,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:28:23,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:28:23,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:28:23,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:28:23,312 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:28:23,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:28:23,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:28:23,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:28:23,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:28:23,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:28:23,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:28:23,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:28:23,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:28:23,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:28:23,317 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:28:23,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:28:23,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:28:23,318 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:28:23,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:28:23,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:28:23,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:28:23,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:28:23,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:28:23,319 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:28:23,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:28:23,320 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:28:23,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:28:23,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87992b509300f030a5da432e9377be19bc7547f7933c7234d13c36c34b6235c7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:28:23,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:28:23,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:28:23,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:28:23,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:28:23,563 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:28:23,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2024-09-21 11:28:24,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:28:24,958 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:28:24,959 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2024-09-21 11:28:24,964 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7dbf88ec6/2051b2b3441540c982340b7e35814ce5/FLAG7001a47ce [2024-09-21 11:28:24,976 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7dbf88ec6/2051b2b3441540c982340b7e35814ce5 [2024-09-21 11:28:24,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:28:24,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:28:24,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:28:24,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:28:24,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:28:24,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:28:24" (1/1) ... [2024-09-21 11:28:24,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5072c197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:24, skipping insertion in model container [2024-09-21 11:28:24,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:28:24" (1/1) ... [2024-09-21 11:28:25,009 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:28:25,125 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/Mono1_1-2.c[313,326] [2024-09-21 11:28:25,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:28:25,142 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:28:25,152 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/Mono1_1-2.c[313,326] [2024-09-21 11:28:25,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:28:25,170 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:28:25,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25 WrapperNode [2024-09-21 11:28:25,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:28:25,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:28:25,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:28:25,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:28:25,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,188 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:28:25,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:28:25,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:28:25,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:28:25,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:28:25,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,234 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 11:28:25,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,244 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:28:25,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:28:25,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:28:25,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:28:25,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (1/1) ... [2024-09-21 11:28:25,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:28:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:25,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:28:25,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:28:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:28:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:28:25,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:28:25,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:28:25,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:28:25,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:28:25,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:28:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:28:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:28:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:28:25,403 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:28:25,405 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:28:25,484 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-21 11:28:25,486 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:28:25,503 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:28:25,504 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:28:25,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:28:25 BoogieIcfgContainer [2024-09-21 11:28:25,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:28:25,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:28:25,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:28:25,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:28:25,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:28:24" (1/3) ... [2024-09-21 11:28:25,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:28:25, skipping insertion in model container [2024-09-21 11:28:25,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:28:25" (2/3) ... [2024-09-21 11:28:25,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:28:25, skipping insertion in model container [2024-09-21 11:28:25,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:28:25" (3/3) ... [2024-09-21 11:28:25,512 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2024-09-21 11:28:25,524 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:28:25,524 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:28:25,559 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:28:25,563 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;@6bc0fc9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:28:25,564 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:28:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2024-09-21 11:28:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:28:25,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:25,573 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:25,573 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:25,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1330752012, now seen corresponding path program 1 times [2024-09-21 11:28:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:25,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835150094] [2024-09-21 11:28:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:25,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:25,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:25,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835150094] [2024-09-21 11:28:25,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835150094] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:28:25,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:28:25,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:28:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971815112] [2024-09-21 11:28:25,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:28:25,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:28:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:28:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:28:25,752 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-09-21 11:28:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:25,771 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-09-21 11:28:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:28:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 10 [2024-09-21 11:28:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:25,785 INFO L225 Difference]: With dead ends: 29 [2024-09-21 11:28:25,787 INFO L226 Difference]: Without dead ends: 12 [2024-09-21 11:28:25,790 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 [2024-09-21 11:28:25,793 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:25,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:28:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-21 11:28:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-21 11:28:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2024-09-21 11:28:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-09-21 11:28:25,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2024-09-21 11:28:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:25,828 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-09-21 11:28:25,829 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2024-09-21 11:28:25,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-09-21 11:28:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:28:25,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:25,831 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:25,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:28:25,832 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1321516802, now seen corresponding path program 1 times [2024-09-21 11:28:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830113163] [2024-09-21 11:28:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:25,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830113163] [2024-09-21 11:28:25,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830113163] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:28:25,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:28:25,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:28:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452434330] [2024-09-21 11:28:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:28:25,933 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:28:25,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:25,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:28:25,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:28:25,934 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-09-21 11:28:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:25,960 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-09-21 11:28:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:28:25,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2024-09-21 11:28:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:25,961 INFO L225 Difference]: With dead ends: 21 [2024-09-21 11:28:25,961 INFO L226 Difference]: Without dead ends: 14 [2024-09-21 11:28:25,962 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 [2024-09-21 11:28:25,964 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:25,964 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:28:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-21 11:28:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-21 11:28:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2024-09-21 11:28:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-21 11:28:25,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-09-21 11:28:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:25,971 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-21 11:28:25,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-09-21 11:28:25,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-21 11:28:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 11:28:25,973 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:25,973 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:25,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:28:25,973 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:25,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -257340833, now seen corresponding path program 1 times [2024-09-21 11:28:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:25,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514916742] [2024-09-21 11:28:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:25,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:26,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514916742] [2024-09-21 11:28:26,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514916742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:26,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391188399] [2024-09-21 11:28:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:26,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:26,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:26,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:26,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:28:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:28:26,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391188399] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:26,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:26,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2024-09-21 11:28:26,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020837604] [2024-09-21 11:28:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:26,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:28:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:28:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:28:26,293 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:26,370 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-09-21 11:28:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:28:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 11:28:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:26,374 INFO L225 Difference]: With dead ends: 24 [2024-09-21 11:28:26,374 INFO L226 Difference]: Without dead ends: 17 [2024-09-21 11:28:26,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:28:26,375 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:26,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:28:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-21 11:28:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-21 11:28:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2024-09-21 11:28:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-21 11:28:26,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2024-09-21 11:28:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:26,383 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-21 11:28:26,383 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-21 11:28:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:28:26,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:26,385 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:26,397 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:28:26,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:26,590 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:26,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1791473815, now seen corresponding path program 1 times [2024-09-21 11:28:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894764216] [2024-09-21 11:28:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894764216] [2024-09-21 11:28:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894764216] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858906597] [2024-09-21 11:28:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:26,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:26,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:28:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:26,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 11:28:26,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858906597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:26,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 14 [2024-09-21 11:28:26,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245794310] [2024-09-21 11:28:26,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:27,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 11:28:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 11:28:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:28:27,003 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:27,184 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-09-21 11:28:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 11:28:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-21 11:28:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:27,186 INFO L225 Difference]: With dead ends: 34 [2024-09-21 11:28:27,187 INFO L226 Difference]: Without dead ends: 23 [2024-09-21 11:28:27,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:28:27,188 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:27,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:28:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-21 11:28:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-21 11:28:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2024-09-21 11:28:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-21 11:28:27,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2024-09-21 11:28:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:27,199 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-21 11:28:27,199 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:27,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-21 11:28:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 11:28:27,200 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:27,201 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:27,215 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:28:27,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:27,409 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:27,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1608409002, now seen corresponding path program 2 times [2024-09-21 11:28:27,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:27,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400187450] [2024-09-21 11:28:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:28:27,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:27,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400187450] [2024-09-21 11:28:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400187450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526461621] [2024-09-21 11:28:27,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:28:27,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:27,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:27,537 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:28:27,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:28:27,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:27,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 11:28:27,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:27,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:28:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526461621] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:27,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:27,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 16 [2024-09-21 11:28:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849724537] [2024-09-21 11:28:27,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:27,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 11:28:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 11:28:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:28:27,785 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2024-09-21 11:28:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:28,377 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-21 11:28:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 11:28:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 22 [2024-09-21 11:28:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:28,378 INFO L225 Difference]: With dead ends: 49 [2024-09-21 11:28:28,378 INFO L226 Difference]: Without dead ends: 37 [2024-09-21 11:28:28,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2024-09-21 11:28:28,381 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:28,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:28:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-21 11:28:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-21 11:28:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 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) [2024-09-21 11:28:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-09-21 11:28:28,396 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 22 [2024-09-21 11:28:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:28,397 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-09-21 11:28:28,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2024-09-21 11:28:28,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-09-21 11:28:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 11:28:28,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:28,398 INFO L216 NwaCegarLoop]: trace histogram [13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:28,413 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:28:28,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:28,599 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:28,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 223404661, now seen corresponding path program 3 times [2024-09-21 11:28:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536413834] [2024-09-21 11:28:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:28,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:28,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:28:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536413834] [2024-09-21 11:28:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536413834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:28,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376322961] [2024-09-21 11:28:28,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:28:28,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:28,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:28,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:28:28,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-21 11:28:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:28,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-21 11:28:28,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 9 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-21 11:28:28,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 9 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-21 11:28:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376322961] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:29,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:29,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 9] total 24 [2024-09-21 11:28:29,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864471097] [2024-09-21 11:28:29,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:29,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 11:28:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 11:28:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2024-09-21 11:28:29,192 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:33,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-21 11:28:37,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-21 11:28:41,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-21 11:28:45,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-21 11:28:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:45,811 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2024-09-21 11:28:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-21 11:28:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-21 11:28:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:45,813 INFO L225 Difference]: With dead ends: 76 [2024-09-21 11:28:45,813 INFO L226 Difference]: Without dead ends: 61 [2024-09-21 11:28:45,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:28:45,814 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:45,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2024-09-21 11:28:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-21 11:28:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2024-09-21 11:28:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 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) [2024-09-21 11:28:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-09-21 11:28:45,825 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 36 [2024-09-21 11:28:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:45,827 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-09-21 11:28:45,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:28:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-09-21 11:28:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-21 11:28:45,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:45,828 INFO L216 NwaCegarLoop]: trace histogram [19, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:45,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:28:46,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:46,029 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:46,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1147212569, now seen corresponding path program 4 times [2024-09-21 11:28:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150856215] [2024-09-21 11:28:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:46,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-21 11:28:46,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:46,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150856215] [2024-09-21 11:28:46,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150856215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:46,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110607595] [2024-09-21 11:28:46,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:28:46,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:46,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:46,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:28:46,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:28:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:46,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-21 11:28:46,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:28:46,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:28:47,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110607595] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:47,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:47,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 21] total 40 [2024-09-21 11:28:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198067203] [2024-09-21 11:28:47,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:47,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-21 11:28:47,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-21 11:28:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 11:28:47,342 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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) [2024-09-21 11:29:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:29:23,541 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2024-09-21 11:29:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-21 11:29:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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 48 [2024-09-21 11:29:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:29:23,542 INFO L225 Difference]: With dead ends: 109 [2024-09-21 11:29:23,543 INFO L226 Difference]: Without dead ends: 87 [2024-09-21 11:29:23,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=1171, Invalid=2135, Unknown=0, NotChecked=0, Total=3306 [2024-09-21 11:29:23,544 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:29:23,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:29:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-21 11:29:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-21 11:29:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 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) [2024-09-21 11:29:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-09-21 11:29:23,559 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 48 [2024-09-21 11:29:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:29:23,560 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-09-21 11:29:23,560 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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) [2024-09-21 11:29:23,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:29:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-09-21 11:29:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-21 11:29:23,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:29:23,562 INFO L216 NwaCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:29:23,576 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:29:23,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:29:23,763 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:29:23,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:29:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1990911488, now seen corresponding path program 5 times [2024-09-21 11:29:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:29:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509169958] [2024-09-21 11:29:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:29:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:29:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:24,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:29:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-21 11:29:24,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:29:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509169958] [2024-09-21 11:29:24,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509169958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:29:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322834270] [2024-09-21 11:29:24,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:29:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:29:24,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:29:24,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:29:24,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:29:24,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2024-09-21 11:29:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:29:24,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-21 11:29:24,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:29:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 416 proven. 992 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-21 11:29:24,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:29:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 416 proven. 992 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-21 11:29:26,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322834270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:29:26,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:29:26,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 68 [2024-09-21 11:29:26,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276185307] [2024-09-21 11:29:26,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:29:26,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-21 11:29:26,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:29:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-21 11:29:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=3302, Unknown=0, NotChecked=0, Total=4556 [2024-09-21 11:29:26,873 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 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) [2024-09-21 11:30:06,206 WARN L293 SmtUtils]: Spent 17.54s on a formula simplification. DAG size of input: 193 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:30:39,906 WARN L293 SmtUtils]: Spent 14.48s on a formula simplification. DAG size of input: 187 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:31:10,119 WARN L293 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 181 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:31:34,610 WARN L293 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 175 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:31:59,075 WARN L293 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 169 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:32:23,694 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 163 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:32:47,369 WARN L293 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 157 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)