./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps4-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/ps4-ll.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 ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 23:27:44,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 23:27:44,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 23:27:44,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 23:27:44,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 23:27:44,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 23:27:44,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 23:27:44,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 23:27:44,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 23:27:44,757 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 23:27:44,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 23:27:44,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 23:27:44,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 23:27:44,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 23:27:44,759 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 23:27:44,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 23:27:44,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 23:27:44,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 23:27:44,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 23:27:44,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 23:27:44,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 23:27:44,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 23:27:44,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 23:27:44,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 23:27:44,763 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 23:27:44,763 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 23:27:44,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 23:27:44,764 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 23:27:44,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 23:27:44,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 23:27:44,764 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 23:27:44,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 23:27:44,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:27:44,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 23:27:44,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 23:27:44,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 23:27:44,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 23:27:44,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 23:27:44,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 23:27:44,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 23:27:44,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 23:27:44,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 23:27:44,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 23:27:45,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 23:27:45,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 23:27:45,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 23:27:45,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 23:27:45,067 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 23:27:45,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/ps4-ll.c [2024-09-12 23:27:46,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 23:27:46,633 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 23:27:46,634 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/ps4-ll.c [2024-09-12 23:27:46,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a1b6e1b7d/bb5e37bdd04e4c20b9f0b0c26d54a9fe/FLAG817afae54 [2024-09-12 23:27:46,663 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a1b6e1b7d/bb5e37bdd04e4c20b9f0b0c26d54a9fe [2024-09-12 23:27:46,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 23:27:46,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 23:27:46,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 23:27:46,674 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 23:27:46,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 23:27:46,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad474cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46, skipping insertion in model container [2024-09-12 23:27:46,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,704 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 23:27:46,871 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/nla-digbench/ps4-ll.c[458,471] [2024-09-12 23:27:46,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:27:46,910 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 23:27:46,922 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/nla-digbench/ps4-ll.c[458,471] [2024-09-12 23:27:46,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:27:46,947 INFO L204 MainTranslator]: Completed translation [2024-09-12 23:27:46,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46 WrapperNode [2024-09-12 23:27:46,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 23:27:46,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 23:27:46,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 23:27:46,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 23:27:46,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,968 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 23:27:46,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 23:27:46,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 23:27:46,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 23:27:46,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 23:27:46,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,980 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,995 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 23:27:46,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:46,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:47,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:47,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:47,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:47,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 23:27:47,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 23:27:47,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 23:27:47,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 23:27:47,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (1/1) ... [2024-09-12 23:27:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:27:47,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:27:47,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 23:27:47,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 23:27:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 23:27:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 23:27:47,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 23:27:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 23:27:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 23:27:47,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 23:27:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 23:27:47,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 23:27:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 23:27:47,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 23:27:47,160 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 23:27:47,163 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 23:27:47,328 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 23:27:47,328 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 23:27:47,353 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 23:27:47,353 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 23:27:47,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:27:47 BoogieIcfgContainer [2024-09-12 23:27:47,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 23:27:47,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 23:27:47,361 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 23:27:47,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 23:27:47,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 11:27:46" (1/3) ... [2024-09-12 23:27:47,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764dfa47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:27:47, skipping insertion in model container [2024-09-12 23:27:47,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:27:46" (2/3) ... [2024-09-12 23:27:47,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764dfa47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:27:47, skipping insertion in model container [2024-09-12 23:27:47,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:27:47" (3/3) ... [2024-09-12 23:27:47,368 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2024-09-12 23:27:47,384 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 23:27:47,385 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 23:27:47,442 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 23:27:47,452 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;@53b98575, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 23:27:47,453 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 23:27:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 23:27:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 23:27:47,466 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:27:47,467 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:27:47,467 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:27:47,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash -351285298, now seen corresponding path program 1 times [2024-09-12 23:27:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:27:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605060871] [2024-09-12 23:27:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:27:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:27:47,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:27:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:27:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:27:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:27:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605060871] [2024-09-12 23:27:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605060871] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:27:47,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:27:47,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 23:27:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093501673] [2024-09-12 23:27:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:27:47,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 23:27:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:27:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 23:27:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 23:27:47,674 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:27:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:27:47,699 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2024-09-12 23:27:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 23:27:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 23:27:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:27:47,706 INFO L225 Difference]: With dead ends: 35 [2024-09-12 23:27:47,706 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 23:27:47,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 23:27:47,712 INFO L434 NwaCegarLoop]: 20 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, 20 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 [2024-09-12 23:27:47,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:27:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 23:27:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 23:27:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 23:27:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-12 23:27:47,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-12 23:27:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:27:47,742 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-12 23:27:47,742 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:27:47,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-12 23:27:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 23:27:47,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:27:47,744 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:27:47,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 23:27:47,745 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:27:47,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -358733048, now seen corresponding path program 1 times [2024-09-12 23:27:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:27:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228077420] [2024-09-12 23:27:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:27:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:27:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947825542] [2024-09-12 23:27:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:47,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:27:47,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:27:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 23:27:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:27:47,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:27:47,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:27:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:27:47,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:27:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:27:47,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228077420] [2024-09-12 23:27:47,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:27:47,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947825542] [2024-09-12 23:27:47,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947825542] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:27:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:27:47,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:27:47,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572909863] [2024-09-12 23:27:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:27:47,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:27:47,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:27:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:27:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:27:47,982 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:27:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:27:48,067 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-12 23:27:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:27:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 23:27:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:27:48,069 INFO L225 Difference]: With dead ends: 27 [2024-09-12 23:27:48,069 INFO L226 Difference]: Without dead ends: 23 [2024-09-12 23:27:48,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:27:48,071 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:27:48,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:27:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-12 23:27:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-12 23:27:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 23:27:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-12 23:27:48,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2024-09-12 23:27:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:27:48,088 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-12 23:27:48,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:27:48,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-12 23:27:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 23:27:48,089 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:27:48,090 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:27:48,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 23:27:48,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:48,291 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:27:48,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1065532175, now seen corresponding path program 1 times [2024-09-12 23:27:48,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:27:48,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574808724] [2024-09-12 23:27:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:48,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:27:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:27:48,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61956468] [2024-09-12 23:27:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:48,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:48,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:27:48,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:27:48,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 23:27:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:27:48,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 23:27:48,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:27:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:27:48,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:27:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 23:27:48,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:27:48,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574808724] [2024-09-12 23:27:48,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:27:48,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61956468] [2024-09-12 23:27:48,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61956468] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 23:27:48,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:27:48,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-12 23:27:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195992120] [2024-09-12 23:27:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:27:48,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:27:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:27:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:27:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 23:27:48,552 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:27:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:27:48,593 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2024-09-12 23:27:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:27:48,594 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-12 23:27:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:27:48,595 INFO L225 Difference]: With dead ends: 29 [2024-09-12 23:27:48,595 INFO L226 Difference]: Without dead ends: 24 [2024-09-12 23:27:48,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 23:27:48,597 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 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 [2024-09-12 23:27:48,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:27:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-12 23:27:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-12 23:27:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 23:27:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2024-09-12 23:27:48,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2024-09-12 23:27:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:27:48,607 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2024-09-12 23:27:48,607 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:27:48,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2024-09-12 23:27:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 23:27:48,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:27:48,609 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:27:48,623 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 23:27:48,812 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:48,813 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:27:48,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -12265240, now seen corresponding path program 1 times [2024-09-12 23:27:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:27:48,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506855187] [2024-09-12 23:27:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:27:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:27:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081761020] [2024-09-12 23:27:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:48,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:27:48,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:27:48,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 23:27:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:27:48,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 23:27:48,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:27:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 23:27:49,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:27:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 23:27:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:27:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506855187] [2024-09-12 23:27:49,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:27:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081761020] [2024-09-12 23:27:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081761020] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:27:49,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:27:49,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-12 23:27:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234243368] [2024-09-12 23:27:49,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:27:49,384 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:27:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:27:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:27:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:27:49,386 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 23:27:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:27:49,557 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2024-09-12 23:27:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 23:27:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2024-09-12 23:27:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:27:49,558 INFO L225 Difference]: With dead ends: 43 [2024-09-12 23:27:49,560 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 23:27:49,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-12 23:27:49,563 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:27:49,563 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:27:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 23:27:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-12 23:27:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 23:27:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-09-12 23:27:49,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2024-09-12 23:27:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:27:49,585 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-09-12 23:27:49,586 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 23:27:49,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-09-12 23:27:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 23:27:49,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:27:49,589 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:27:49,606 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 23:27:49,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:49,790 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:27:49,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -845420161, now seen corresponding path program 2 times [2024-09-12 23:27:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:27:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685654208] [2024-09-12 23:27:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:27:49,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:27:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:27:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218149787] [2024-09-12 23:27:49,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:27:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:27:49,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:27:49,832 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 23:27:49,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:27:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:27:49,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 23:27:49,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:27:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 23:27:50,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:27:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 23:27:50,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:27:50,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685654208] [2024-09-12 23:27:50,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:27:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218149787] [2024-09-12 23:27:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218149787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:27:50,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:27:50,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-09-12 23:27:50,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891682261] [2024-09-12 23:27:50,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:27:50,530 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 23:27:50,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:27:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 23:27:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:27:50,534 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 23:27:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:27:50,837 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-09-12 23:27:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 23:27:50,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 44 [2024-09-12 23:27:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:27:50,839 INFO L225 Difference]: With dead ends: 41 [2024-09-12 23:27:50,839 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 23:27:50,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-09-12 23:27:50,840 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:27:50,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 23:27:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 23:27:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 23:27:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-12 23:27:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 23:27:50,842 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2024-09-12 23:27:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:27:50,842 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 23:27:50,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 23:27:50,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:27:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 23:27:50,843 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 23:27:50,846 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 23:27:50,863 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 23:27:51,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:27:51,053 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-09-12 23:27:51,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 23:27:51,339 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 23:27:51,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 11:27:51 BoogieIcfgContainer [2024-09-12 23:27:51,361 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 23:27:51,362 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 23:27:51,362 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 23:27:51,362 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 23:27:51,363 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:27:47" (3/4) ... [2024-09-12 23:27:51,365 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 23:27:51,368 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 23:27:51,368 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 23:27:51,368 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 23:27:51,372 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-12 23:27:51,373 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-12 23:27:51,373 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 23:27:51,373 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 23:27:51,458 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 23:27:51,459 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 23:27:51,459 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 23:27:51,460 INFO L158 Benchmark]: Toolchain (without parser) took 4789.48ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 125.3MB in the beginning and 78.9MB in the end (delta: 46.4MB). Peak memory consumption was 78.9MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,460 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:27:51,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.34ms. Allocated memory is still 155.2MB. Free memory was 125.3MB in the beginning and 113.8MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.30ms. Allocated memory is still 155.2MB. Free memory was 113.8MB in the beginning and 112.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:27:51,461 INFO L158 Benchmark]: Boogie Preprocessor took 37.09ms. Allocated memory is still 155.2MB. Free memory was 112.7MB in the beginning and 110.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,462 INFO L158 Benchmark]: RCFGBuilder took 351.03ms. Allocated memory is still 155.2MB. Free memory was 110.6MB in the beginning and 122.7MB in the end (delta: -12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,462 INFO L158 Benchmark]: TraceAbstraction took 4000.56ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 121.7MB in the beginning and 84.1MB in the end (delta: 37.5MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,463 INFO L158 Benchmark]: Witness Printer took 97.33ms. Allocated memory is still 186.6MB. Free memory was 84.1MB in the beginning and 78.9MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-09-12 23:27:51,464 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.34ms. Allocated memory is still 155.2MB. Free memory was 125.3MB in the beginning and 113.8MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.30ms. Allocated memory is still 155.2MB. Free memory was 113.8MB in the beginning and 112.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.09ms. Allocated memory is still 155.2MB. Free memory was 112.7MB in the beginning and 110.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 351.03ms. Allocated memory is still 155.2MB. Free memory was 110.6MB in the beginning and 122.7MB in the end (delta: -12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4000.56ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 121.7MB in the beginning and 84.1MB in the end (delta: 37.5MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. * Witness Printer took 97.33ms. Allocated memory is still 186.6MB. Free memory was 84.1MB in the beginning and 78.9MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 253 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 282 IncrementalHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 72 mSDtfsCounter, 282 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 964 SizeOfPredicates, 8 NumberOfNonLiveVariables, 306 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 94/190 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((c + ((__int128) c * y)) == (y + ((__int128) y * y))) && ((((__int128) c * 2) + ((__int128) c * y)) == (((__int128) y * 2) + ((__int128) y * y)))) && (((((((__int128) y * y) * y) * y) + ((__int128) y * y)) + ((((__int128) y * y) * y) * 2)) == ((__int128) x * 4))) && ((c < k) || (((__int128) y * y) == ((__int128) k * y)))) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-12 23:27:51,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE