./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.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 e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:31:31,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:31:31,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:31:31,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:31:31,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:31:31,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:31:31,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:31:31,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:31:31,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:31:31,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:31:31,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:31:31,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:31:31,970 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:31:31,970 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:31:31,970 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:31:31,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:31:31,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:31:31,971 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:31:31,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:31:31,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:31:31,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:31:31,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:31:31,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:31:31,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:31:31,975 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:31:31,975 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:31:31,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:31:31,975 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:31:31,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:31:31,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:31:31,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:31:31,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:31:31,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:31:31,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:31:31,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:31:31,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:31:31,977 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:31:31,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:31:31,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:31:31,978 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:31:31,978 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:31:31,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:31:31,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:31:32,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:31:32,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:31:32,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:31:32,265 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:31:32,265 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:31:32,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-11 19:31:33,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:31:33,848 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:31:33,849 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-11 19:31:33,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/68204d642/0e663d3151194e0d8caaeca43b731bfc/FLAG555f9965e [2024-09-11 19:31:33,876 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/68204d642/0e663d3151194e0d8caaeca43b731bfc [2024-09-11 19:31:33,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:31:33,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:31:33,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:31:33,884 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:31:33,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:31:33,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:31:33" (1/1) ... [2024-09-11 19:31:33,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35031297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:33, skipping insertion in model container [2024-09-11 19:31:33,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:31:33" (1/1) ... [2024-09-11 19:31:33,912 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:31:34,137 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2024-09-11 19:31:34,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:31:34,169 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:31:34,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2024-09-11 19:31:34,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:31:34,200 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:31:34,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34 WrapperNode [2024-09-11 19:31:34,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:31:34,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:31:34,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:31:34,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:31:34,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,215 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,229 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2024-09-11 19:31:34,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:31:34,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:31:34,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:31:34,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:31:34,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,252 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]. [2024-09-11 19:31:34,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,264 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:31:34,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:31:34,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:31:34,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:31:34,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (1/1) ... [2024-09-11 19:31:34,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:31:34,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:34,306 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) [2024-09-11 19:31:34,309 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 [2024-09-11 19:31:34,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:31:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:31:34,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:31:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:31:34,409 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:31:34,411 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:31:34,513 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-11 19:31:34,513 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:31:34,535 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:31:34,535 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 19:31:34,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:31:34 BoogieIcfgContainer [2024-09-11 19:31:34,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:31:34,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:31:34,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:31:34,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:31:34,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:31:33" (1/3) ... [2024-09-11 19:31:34,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c929a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:31:34, skipping insertion in model container [2024-09-11 19:31:34,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:31:34" (2/3) ... [2024-09-11 19:31:34,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c929a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:31:34, skipping insertion in model container [2024-09-11 19:31:34,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:31:34" (3/3) ... [2024-09-11 19:31:34,556 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2024-09-11 19:31:34,574 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:31:34,574 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:31:34,640 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:31:34,649 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;@24f4e2e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:31:34,653 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:31:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-11 19:31:34,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:34,668 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-11 19:31:34,668 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 63417192, now seen corresponding path program 1 times [2024-09-11 19:31:34,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:34,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733642341] [2024-09-11 19:31:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:34,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733642341] [2024-09-11 19:31:34,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733642341] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:31:34,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:31:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:31:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013297694] [2024-09-11 19:31:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:31:34,858 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:31:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:31:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:31:34,883 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:34,905 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-09-11 19:31:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:31:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-11 19:31:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:34,912 INFO L225 Difference]: With dead ends: 16 [2024-09-11 19:31:34,912 INFO L226 Difference]: Without dead ends: 8 [2024-09-11 19:31:34,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:31:34,920 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:34,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:31:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-09-11 19:31:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-09-11 19:31:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-09-11 19:31:34,947 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2024-09-11 19:31:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:34,948 INFO L474 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-09-11 19:31:34,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:34,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-09-11 19:31:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-11 19:31:34,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:34,949 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-11 19:31:34,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:31:34,949 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:34,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 63089491, now seen corresponding path program 1 times [2024-09-11 19:31:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231287487] [2024-09-11 19:31:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231287487] [2024-09-11 19:31:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231287487] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:31:35,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:31:35,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:31:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924982562] [2024-09-11 19:31:35,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:31:35,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:31:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:31:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:31:35,122 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:35,158 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2024-09-11 19:31:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:31:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-11 19:31:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:35,159 INFO L225 Difference]: With dead ends: 18 [2024-09-11 19:31:35,159 INFO L226 Difference]: Without dead ends: 11 [2024-09-11 19:31:35,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:31:35,161 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:35,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:31:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-11 19:31:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2024-09-11 19:31:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-09-11 19:31:35,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2024-09-11 19:31:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:35,167 INFO L474 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-09-11 19:31:35,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-09-11 19:31:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:31:35,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:35,168 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:35,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:31:35,168 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:35,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash -100395752, now seen corresponding path program 1 times [2024-09-11 19:31:35,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:35,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709677175] [2024-09-11 19:31:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:35,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:35,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709677175] [2024-09-11 19:31:35,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709677175] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:35,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543901311] [2024-09-11 19:31:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:35,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:35,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:35,483 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) [2024-09-11 19:31:35,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:31:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:35,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 19:31:35,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:35,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543901311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2024-09-11 19:31:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727291925] [2024-09-11 19:31:35,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:35,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:31:35,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:35,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:31:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:31:35,702 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:35,793 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2024-09-11 19:31:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:31:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:31:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:35,795 INFO L225 Difference]: With dead ends: 25 [2024-09-11 19:31:35,796 INFO L226 Difference]: Without dead ends: 18 [2024-09-11 19:31:35,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:31:35,798 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:35,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:31:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-11 19:31:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-11 19:31:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-09-11 19:31:35,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2024-09-11 19:31:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:35,810 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-09-11 19:31:35,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:35,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-09-11 19:31:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:31:35,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:35,812 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2024-09-11 19:31:35,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:31:36,016 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 [2024-09-11 19:31:36,017 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:36,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1140498195, now seen corresponding path program 2 times [2024-09-11 19:31:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:36,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605850820] [2024-09-11 19:31:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605850820] [2024-09-11 19:31:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605850820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:36,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16926897] [2024-09-11 19:31:36,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:31:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:36,326 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) [2024-09-11 19:31:36,329 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:31:36,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:31:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:31:36,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-11 19:31:36,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:36,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:36,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16926897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:36,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:36,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-09-11 19:31:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127936616] [2024-09-11 19:31:36,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:36,644 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:31:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:36,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:31:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:31:36,647 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:37,056 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2024-09-11 19:31:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:31:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-11 19:31:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:37,057 INFO L225 Difference]: With dead ends: 45 [2024-09-11 19:31:37,057 INFO L226 Difference]: Without dead ends: 36 [2024-09-11 19:31:37,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:31:37,059 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:37,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:31:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-11 19:31:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-11 19:31:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-11 19:31:37,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2024-09-11 19:31:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:37,073 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-11 19:31:37,074 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:37,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-11 19:31:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:31:37,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:37,075 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2024-09-11 19:31:37,092 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:31:37,279 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 [2024-09-11 19:31:37,280 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:37,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:37,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1831092403, now seen corresponding path program 3 times [2024-09-11 19:31:37,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:37,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204534613] [2024-09-11 19:31:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:37,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204534613] [2024-09-11 19:31:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204534613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434156910] [2024-09-11 19:31:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:31:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:37,758 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) [2024-09-11 19:31:37,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:31:37,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 19:31:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:31:37,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:31:37,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-11 19:31:37,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:31:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434156910] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:31:37,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:31:37,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2024-09-11 19:31:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280272702] [2024-09-11 19:31:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:31:37,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:31:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:31:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-09-11 19:31:37,957 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:38,025 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-09-11 19:31:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:31:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-09-11 19:31:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:38,027 INFO L225 Difference]: With dead ends: 62 [2024-09-11 19:31:38,027 INFO L226 Difference]: Without dead ends: 58 [2024-09-11 19:31:38,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:31:38,028 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:38,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:31:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-11 19:31:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2024-09-11 19:31:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-11 19:31:38,046 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2024-09-11 19:31:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:38,048 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-11 19:31:38,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:38,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-11 19:31:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:31:38,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:38,050 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:38,068 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:31:38,251 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 [2024-09-11 19:31:38,251 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:38,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1773834101, now seen corresponding path program 1 times [2024-09-11 19:31:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698376920] [2024-09-11 19:31:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:38,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:38,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698376920] [2024-09-11 19:31:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698376920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316160857] [2024-09-11 19:31:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:38,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:38,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:38,474 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) [2024-09-11 19:31:38,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:31:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:38,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:31:38,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:38,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:39,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316160857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:39,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:39,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 23 [2024-09-11 19:31:39,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48595466] [2024-09-11 19:31:39,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:39,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 19:31:39,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:39,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 19:31:39,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:31:39,063 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:41,409 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2024-09-11 19:31:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 19:31:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-09-11 19:31:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:41,411 INFO L225 Difference]: With dead ends: 87 [2024-09-11 19:31:41,412 INFO L226 Difference]: Without dead ends: 69 [2024-09-11 19:31:41,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=393, Invalid=663, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:31:41,413 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:41,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:31:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-11 19:31:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-11 19:31:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-11 19:31:41,435 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 35 [2024-09-11 19:31:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:41,436 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-11 19:31:41,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:41,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-11 19:31:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-11 19:31:41,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:41,438 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:41,455 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 19:31:41,642 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 [2024-09-11 19:31:41,643 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:41,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1186010854, now seen corresponding path program 2 times [2024-09-11 19:31:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:41,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913302663] [2024-09-11 19:31:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913302663] [2024-09-11 19:31:42,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913302663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:42,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673579605] [2024-09-11 19:31:42,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:31:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:42,226 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) [2024-09-11 19:31:42,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:31:42,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:31:42,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:31:42,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:31:42,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:42,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:31:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673579605] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:43,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2024-09-11 19:31:43,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560958094] [2024-09-11 19:31:43,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:43,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-11 19:31:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-11 19:31:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:31:43,131 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:32:34,333 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2024-09-11 19:32:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-11 19:32:34,335 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-09-11 19:32:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:32:34,336 INFO L225 Difference]: With dead ends: 144 [2024-09-11 19:32:34,336 INFO L226 Difference]: Without dead ends: 135 [2024-09-11 19:32:34,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=1470, Invalid=2690, Unknown=0, NotChecked=0, Total=4160 [2024-09-11 19:32:34,339 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:32:34,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 68 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:32:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-11 19:32:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-09-11 19:32:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2024-09-11 19:32:34,370 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 68 [2024-09-11 19:32:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:32:34,371 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2024-09-11 19:32:34,371 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:34,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2024-09-11 19:32:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-11 19:32:34,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:32:34,375 INFO L216 NwaCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1] [2024-09-11 19:32:34,390 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:32:34,575 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 [2024-09-11 19:32:34,576 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:32:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 523367546, now seen corresponding path program 3 times [2024-09-11 19:32:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:32:34,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073652744] [2024-09-11 19:32:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:32:34,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:32:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:32:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:32:36,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:32:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073652744] [2024-09-11 19:32:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073652744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:32:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763476103] [2024-09-11 19:32:36,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:32:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:32:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:32:36,224 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) [2024-09-11 19:32:36,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:32:36,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:32:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:32:36,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:32:36,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:32:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2024-09-11 19:32:36,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:32:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2024-09-11 19:32:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763476103] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:32:37,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:32:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 6, 7] total 55 [2024-09-11 19:32:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534396365] [2024-09-11 19:32:37,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:32:37,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-11 19:32:37,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:32:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-11 19:32:37,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2024-09-11 19:32:37,386 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 56 states, 56 states have (on average 2.75) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:32:40,558 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2024-09-11 19:32:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-11 19:32:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-09-11 19:32:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:32:40,560 INFO L225 Difference]: With dead ends: 163 [2024-09-11 19:32:40,560 INFO L226 Difference]: Without dead ends: 154 [2024-09-11 19:32:40,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2024-09-11 19:32:40,564 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5706 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:32:40,564 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 18 Invalid, 5759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5706 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-11 19:32:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-11 19:32:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2024-09-11 19:32:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2024-09-11 19:32:40,600 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 134 [2024-09-11 19:32:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:32:40,601 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2024-09-11 19:32:40,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 55 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:40,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2024-09-11 19:32:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-11 19:32:40,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:32:40,603 INFO L216 NwaCegarLoop]: trace histogram [49, 49, 44, 5, 1, 1, 1, 1, 1] [2024-09-11 19:32:40,616 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:32:40,807 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:32:40,808 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:32:40,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:32:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1517311322, now seen corresponding path program 4 times [2024-09-11 19:32:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:32:40,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502164170] [2024-09-11 19:32:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:32:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:32:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:32:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 19:32:42,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:32:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502164170] [2024-09-11 19:32:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502164170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:32:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804130342] [2024-09-11 19:32:42,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:32:42,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:32:42,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:32:42,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:32:42,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:32:42,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:32:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:32:42,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-09-11 19:32:42,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:32:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:32:42,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:32:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:32:46,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804130342] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:32:46,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:32:46,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 100 [2024-09-11 19:32:46,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823119174] [2024-09-11 19:32:46,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:32:46,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-09-11 19:32:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:32:46,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-09-11 19:32:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2694, Invalid=7406, Unknown=0, NotChecked=0, Total=10100 [2024-09-11 19:32:46,208 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 101 states, 101 states have (on average 3.00990099009901) internal successors, (304), 100 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:32:57,644 WARN L293 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 198 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:33:22,637 WARN L293 SmtUtils]: Spent 20.45s on a formula simplification. DAG size of input: 194 DAG size of output: 14 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:33:49,206 WARN L293 SmtUtils]: Spent 18.29s on a formula simplification. DAG size of input: 190 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:34:16,216 WARN L293 SmtUtils]: Spent 14.55s on a formula simplification. DAG size of input: 186 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:34:51,078 WARN L293 SmtUtils]: Spent 18.11s on a formula simplification. DAG size of input: 182 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:35:30,448 WARN L293 SmtUtils]: Spent 18.43s on a formula simplification. DAG size of input: 178 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:36:04,361 WARN L293 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 174 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)