./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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-scaling/sqrt1-ll_unwindbound100.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 aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:01:49,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:01:49,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:01:49,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:01:49,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:01:49,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:01:49,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:01:49,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:01:49,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:01:49,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:01:49,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:01:49,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:01:49,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:01:49,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:01:49,851 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:01:49,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:01:49,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:01:49,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:01:49,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:01:49,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:01:49,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:01:49,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:01:49,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:01:49,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:01:49,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:01:49,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:01:49,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:01:49,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:01:49,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:01:49,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:01:49,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:01:49,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:01:49,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:01:49,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:01:49,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:01:49,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:01:49,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:01:49,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:01:49,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:01:49,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:01:49,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:01:49,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:01:49,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:01:50,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:01:50,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:01:50,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:01:50,157 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:01:50,157 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:01:50,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2024-09-20 13:01:51,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:01:51,771 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:01:51,771 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2024-09-20 13:01:51,778 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/36227467f/792d4312670d45e6b16987d5993b61f3/FLAG10e540b15 [2024-09-20 13:01:52,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/36227467f/792d4312670d45e6b16987d5993b61f3 [2024-09-20 13:01:52,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:01:52,181 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:01:52,182 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:01:52,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:01:52,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:01:52,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7131c477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52, skipping insertion in model container [2024-09-20 13:01:52,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,206 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:01:52,346 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2024-09-20 13:01:52,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:01:52,382 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:01:52,397 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2024-09-20 13:01:52,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:01:52,423 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:01:52,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52 WrapperNode [2024-09-20 13:01:52,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:01:52,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:01:52,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:01:52,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:01:52,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,446 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:01:52,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:01:52,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:01:52,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:01:52,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:01:52,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,462 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,481 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]. [2024-09-20 13:01:52,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:01:52,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:01:52,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:01:52,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:01:52,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (1/1) ... [2024-09-20 13:01:52,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:01:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:52,532 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) [2024-09-20 13:01:52,534 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 [2024-09-20 13:01:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:01:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:01:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:01:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:01:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:01:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:01:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:01:52,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:01:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:01:52,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:01:52,638 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:01:52,640 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:01:52,762 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 13:01:52,762 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:01:52,788 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:01:52,788 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 13:01:52,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:52 BoogieIcfgContainer [2024-09-20 13:01:52,789 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:01:52,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:01:52,791 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:01:52,795 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:01:52,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:01:52" (1/3) ... [2024-09-20 13:01:52,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662f9fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:52, skipping insertion in model container [2024-09-20 13:01:52,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:52" (2/3) ... [2024-09-20 13:01:52,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662f9fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:52, skipping insertion in model container [2024-09-20 13:01:52,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:52" (3/3) ... [2024-09-20 13:01:52,798 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2024-09-20 13:01:52,813 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:01:52,813 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:01:52,863 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:01:52,869 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;@250cb9d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:01:52,869 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:01:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 13:01:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 13:01:52,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:52,886 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:52,886 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:52,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -97680429, now seen corresponding path program 1 times [2024-09-20 13:01:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:52,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220041105] [2024-09-20 13:01:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:52,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:01:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:01:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:53,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220041105] [2024-09-20 13:01:53,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220041105] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:01:53,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:01:53,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:01:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019943795] [2024-09-20 13:01:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:53,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 13:01:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 13:01:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:01:53,185 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:53,282 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-09-20 13:01:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 13:01:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-20 13:01:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:53,294 INFO L225 Difference]: With dead ends: 44 [2024-09-20 13:01:53,295 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 13:01:53,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:01:53,304 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:53,306 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 13:01:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-20 13:01:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 13:01:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-09-20 13:01:53,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2024-09-20 13:01:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:53,345 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-09-20 13:01:53,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-09-20 13:01:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:01:53,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:53,349 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:53,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:01:53,350 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:53,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash 801118595, now seen corresponding path program 1 times [2024-09-20 13:01:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266412322] [2024-09-20 13:01:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:01:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:01:53,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266412322] [2024-09-20 13:01:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266412322] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:01:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:01:53,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:01:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764192866] [2024-09-20 13:01:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:53,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:01:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:01:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:01:53,515 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:53,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:53,604 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-20 13:01:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:01:53,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-20 13:01:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:53,605 INFO L225 Difference]: With dead ends: 31 [2024-09-20 13:01:53,605 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 13:01:53,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:01:53,607 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:53,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 13:01:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-20 13:01:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 13:01:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-09-20 13:01:53,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-09-20 13:01:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:53,627 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-09-20 13:01:53,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:53,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-09-20 13:01:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:01:53,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:53,630 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:53,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:01:53,630 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:53,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 802786891, now seen corresponding path program 1 times [2024-09-20 13:01:53,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297204014] [2024-09-20 13:01:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:01:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:01:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297204014] [2024-09-20 13:01:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297204014] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:01:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:01:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 13:01:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234027477] [2024-09-20 13:01:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:53,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:01:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:01:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:01:53,818 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:53,985 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-20 13:01:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:01:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-20 13:01:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:53,988 INFO L225 Difference]: With dead ends: 35 [2024-09-20 13:01:53,989 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 13:01:53,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:01:53,991 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:53,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 13:01:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-20 13:01:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 13:01:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-20 13:01:54,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2024-09-20 13:01:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:54,018 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-20 13:01:54,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:01:54,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-20 13:01:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 13:01:54,019 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:54,021 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:54,021 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 13:01:54,022 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:54,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1280493866, now seen corresponding path program 1 times [2024-09-20 13:01:54,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:54,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034919237] [2024-09-20 13:01:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:01:54,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945418042] [2024-09-20 13:01:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:54,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:54,044 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) [2024-09-20 13:01:54,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:01:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:54,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:01:54,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:01:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:01:54,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:01:54,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:54,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034919237] [2024-09-20 13:01:54,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:01:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945418042] [2024-09-20 13:01:54,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945418042] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:01:54,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:01:54,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:01:54,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992121122] [2024-09-20 13:01:54,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:54,175 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:01:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:01:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:01:54,177 INFO L87 Difference]: Start difference. First operand 31 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), 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) [2024-09-20 13:01:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:54,253 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-20 13:01:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:01:54,253 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 16 [2024-09-20 13:01:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:54,254 INFO L225 Difference]: With dead ends: 39 [2024-09-20 13:01:54,255 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 13:01:54,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:01:54,256 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:54,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 13:01:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-20 13:01:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 13:01:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-09-20 13:01:54,275 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2024-09-20 13:01:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:54,276 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-09-20 13:01:54,276 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) [2024-09-20 13:01:54,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-09-20 13:01:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 13:01:54,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:54,277 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:54,291 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:01:54,478 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:54,478 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:54,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,479 INFO L85 PathProgramCache]: Analyzing trace with hash 925975787, now seen corresponding path program 1 times [2024-09-20 13:01:54,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:54,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241380308] [2024-09-20 13:01:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:54,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:01:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202165603] [2024-09-20 13:01:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:54,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:54,494 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) [2024-09-20 13:01:54,495 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:01:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:54,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:01:54,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:01:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:01:54,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:01:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241380308] [2024-09-20 13:01:54,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:01:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202165603] [2024-09-20 13:01:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202165603] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:01:54,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:01:54,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:01:54,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429632961] [2024-09-20 13:01:54,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:54,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:01:54,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:01:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:01:54,601 INFO L87 Difference]: Start difference. First operand 36 states and 46 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:01:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:54,652 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-09-20 13:01:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:01:54,653 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 13:01:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:54,656 INFO L225 Difference]: With dead ends: 43 [2024-09-20 13:01:54,656 INFO L226 Difference]: Without dead ends: 38 [2024-09-20 13:01:54,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:01:54,657 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:54,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:01:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-20 13:01:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-20 13:01:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 13:01:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-20 13:01:54,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2024-09-20 13:01:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:54,674 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-20 13:01:54,674 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:01:54,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-20 13:01:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 13:01:54,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:54,675 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:54,694 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 13:01:54,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:54,876 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:54,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1435580062, now seen corresponding path program 1 times [2024-09-20 13:01:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073256764] [2024-09-20 13:01:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:01:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:01:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:01:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:01:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:01:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073256764] [2024-09-20 13:01:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073256764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:01:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66841076] [2024-09-20 13:01:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:55,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:55,057 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) [2024-09-20 13:01:55,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:01:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:01:55,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:01:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:01:55,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:01:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:01:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66841076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:01:55,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:01:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-20 13:01:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245028077] [2024-09-20 13:01:55,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:01:55,261 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:01:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:01:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:01:55,262 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 13:01:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:55,468 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-20 13:01:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:01:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 29 [2024-09-20 13:01:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:55,471 INFO L225 Difference]: With dead ends: 79 [2024-09-20 13:01:55,471 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 13:01:55,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:01:55,472 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:55,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 13:01:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-09-20 13:01:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 13:01:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-09-20 13:01:55,515 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 29 [2024-09-20 13:01:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:55,515 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-09-20 13:01:55,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 13:01:55,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-09-20 13:01:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 13:01:55,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:55,516 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:55,553 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:01:55,717 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 13:01:55,717 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1437248358, now seen corresponding path program 1 times [2024-09-20 13:01:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198321919] [2024-09-20 13:01:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:01:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:01:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 13:01:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:01:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:01:55,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:55,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198321919] [2024-09-20 13:01:55,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198321919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:01:55,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703012055] [2024-09-20 13:01:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:55,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:55,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:55,896 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) [2024-09-20 13:01:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:01:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:01:55,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 13:01:55,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:01:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:01:56,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:01:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:01:56,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703012055] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:01:56,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:01:56,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 10 [2024-09-20 13:01:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193307036] [2024-09-20 13:01:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:01:56,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:01:56,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:01:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:01:56,091 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:01:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:56,183 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-20 13:01:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:01:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-20 13:01:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:56,185 INFO L225 Difference]: With dead ends: 80 [2024-09-20 13:01:56,185 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 13:01:56,185 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:01:56,186 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:56,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 13:01:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-20 13:01:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 13:01:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-09-20 13:01:56,207 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2024-09-20 13:01:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:56,207 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-09-20 13:01:56,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:01:56,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-09-20 13:01:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 13:01:56,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:01:56,208 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:56,226 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 13:01:56,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:56,409 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:01:56,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash 857281179, now seen corresponding path program 2 times [2024-09-20 13:01:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:01:56,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567516569] [2024-09-20 13:01:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:01:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:01:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:01:56,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438711690] [2024-09-20 13:01:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:01:56,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:01:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:01:56,424 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) [2024-09-20 13:01:56,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:01:56,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:01:56,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:01:56,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 13:01:56,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:01:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:01:56,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:01:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:01:56,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:01:56,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567516569] [2024-09-20 13:01:56,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:01:56,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438711690] [2024-09-20 13:01:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438711690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:01:56,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:01:56,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-20 13:01:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791721381] [2024-09-20 13:01:56,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:01:56,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:01:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:01:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:01:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:01:56,743 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 13:01:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:01:56,936 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-20 13:01:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:01:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 34 [2024-09-20 13:01:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:01:56,937 INFO L225 Difference]: With dead ends: 78 [2024-09-20 13:01:56,937 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:01:56,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:01:56,938 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:01:56,938 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:01:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:01:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:01:56,939 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) [2024-09-20 13:01:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:01:56,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2024-09-20 13:01:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:01:56,940 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:01:56,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 13:01:56,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:01:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:01:56,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:01:56,942 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 13:01:56,961 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:01:57,146 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 13:01:57,149 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-09-20 13:01:57,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 13:01:57,740 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:01:57,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:01:57 BoogieIcfgContainer [2024-09-20 13:01:57,757 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:01:57,757 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 13:01:57,757 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 13:01:57,757 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 13:01:57,758 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:52" (3/4) ... [2024-09-20 13:01:57,760 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 13:01:57,803 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 13:01:57,804 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 13:01:57,804 INFO L158 Benchmark]: Toolchain (without parser) took 5623.51ms. Allocated memory was 153.1MB in the beginning and 216.0MB in the end (delta: 62.9MB). Free memory was 99.0MB in the beginning and 146.5MB in the end (delta: -47.5MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,804 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 153.1MB. Free memory is still 112.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:01:57,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.82ms. Allocated memory is still 153.1MB. Free memory was 98.6MB in the beginning and 87.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.95ms. Allocated memory is still 153.1MB. Free memory was 87.1MB in the beginning and 85.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:01:57,805 INFO L158 Benchmark]: Boogie Preprocessor took 45.64ms. Allocated memory is still 153.1MB. Free memory was 85.9MB in the beginning and 84.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,805 INFO L158 Benchmark]: RCFGBuilder took 295.32ms. Allocated memory is still 153.1MB. Free memory was 84.3MB in the beginning and 72.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,805 INFO L158 Benchmark]: TraceAbstraction took 4965.45ms. Allocated memory was 153.1MB in the beginning and 216.0MB in the end (delta: 62.9MB). Free memory was 71.3MB in the beginning and 148.6MB in the end (delta: -77.2MB). Peak memory consumption was 76.7MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,805 INFO L158 Benchmark]: Witness Printer took 46.44ms. Allocated memory is still 216.0MB. Free memory was 148.6MB in the beginning and 146.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:01:57,807 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 153.1MB. Free memory is still 112.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.82ms. Allocated memory is still 153.1MB. Free memory was 98.6MB in the beginning and 87.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.95ms. Allocated memory is still 153.1MB. Free memory was 87.1MB in the beginning and 85.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.64ms. Allocated memory is still 153.1MB. Free memory was 85.9MB in the beginning and 84.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 295.32ms. Allocated memory is still 153.1MB. Free memory was 84.3MB in the beginning and 72.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4965.45ms. Allocated memory was 153.1MB in the beginning and 216.0MB in the end (delta: 62.9MB). Free memory was 71.3MB in the beginning and 148.6MB in the end (delta: -77.2MB). Peak memory consumption was 76.7MB. Max. memory is 16.1GB. * Witness Printer took 46.44ms. Allocated memory is still 216.0MB. Free memory was 148.6MB in the beginning and 146.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 14]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 554 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 449 IncrementalHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 157 mSDtfsCounter, 449 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 53, 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, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 290 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 912 SizeOfPredicates, 7 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 168/205 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: 30]: Loop Invariant Derived loop invariant: (((((((__int128) a * 2) + ((__int128) a * a)) + 1) == s) && (\old(counter) == 0)) && (t == (((__int128) a * 2) + 1))) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-20 13:01:57,822 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE