./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.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 ca4ee3dd 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/egcd-ll_valuebound20.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 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --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-ca4ee3d-m [2024-09-20 19:15:56,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:15:56,388 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:15:56,393 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:15:56,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:15:56,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:15:56,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:15:56,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:15:56,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:15:56,416 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:15:56,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:15:56,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:15:56,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:15:56,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:15:56,418 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:15:56,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:15:56,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:15:56,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:15:56,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:15:56,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:15:56,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:15:56,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:15:56,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:15:56,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:15:56,425 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:15:56,425 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:15:56,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:15:56,426 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:15:56,426 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:15:56,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:15:56,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:15:56,427 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:15:56,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:15:56,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:15:56,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:15:56,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:15:56,430 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:15:56,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:15:56,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:15:56,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:15:56,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:15:56,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:15:56,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:15:56,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:15:56,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:15:56,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:15:56,701 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:15:56,701 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:15:56,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2024-09-20 19:15:58,090 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:15:58,249 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:15:58,250 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2024-09-20 19:15:58,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/de7d4f354/b50f6577c0224b709ef65e6a3b750535/FLAG209e296c2 [2024-09-20 19:15:58,273 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/de7d4f354/b50f6577c0224b709ef65e6a3b750535 [2024-09-20 19:15:58,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:15:58,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:15:58,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:15:58,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:15:58,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:15:58,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ad29e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58, skipping insertion in model container [2024-09-20 19:15:58,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,310 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:15:58,462 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/egcd-ll_valuebound20.c[489,502] [2024-09-20 19:15:58,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:15:58,489 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:15:58,500 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/egcd-ll_valuebound20.c[489,502] [2024-09-20 19:15:58,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:15:58,534 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:15:58,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58 WrapperNode [2024-09-20 19:15:58,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:15:58,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:15:58,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:15:58,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:15:58,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,550 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:15:58,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:15:58,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:15:58,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:15:58,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:15:58,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,569 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 19:15:58,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:15:58,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:15:58,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:15:58,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:15:58,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (1/1) ... [2024-09-20 19:15:58,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:15:58,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:15:58,649 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 19:15:58,654 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 19:15:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:15:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:15:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:15:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:15:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:15:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:15:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:15:58,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:15:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:15:58,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:15:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:15:58,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:15:58,751 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:15:58,752 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:15:58,886 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:15:58,887 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:15:58,905 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:15:58,905 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:15:58,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:15:58 BoogieIcfgContainer [2024-09-20 19:15:58,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:15:58,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:15:58,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:15:58,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:15:58,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:15:58" (1/3) ... [2024-09-20 19:15:58,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b61fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:15:58, skipping insertion in model container [2024-09-20 19:15:58,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:15:58" (2/3) ... [2024-09-20 19:15:58,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b61fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:15:58, skipping insertion in model container [2024-09-20 19:15:58,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:15:58" (3/3) ... [2024-09-20 19:15:58,914 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2024-09-20 19:15:58,929 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:15:58,930 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:15:58,995 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:15:59,003 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;@3ed2c3f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:15:59,003 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:15:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 19:15:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:15:59,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:15:59,018 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:15:59,018 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:15:59,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:15:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-20 19:15:59,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:15:59,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410632620] [2024-09-20 19:15:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:15:59,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:15:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:15:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:15:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:15:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:15:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:15:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:15:59,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:15:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410632620] [2024-09-20 19:15:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410632620] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:15:59,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:15:59,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:15:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585698080] [2024-09-20 19:15:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:15:59,265 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:15:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:15:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:15:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:15:59,303 INFO L87 Difference]: Start difference. First operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:15:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:15:59,337 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-20 19:15:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:15:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 19:15:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:15:59,358 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:15:59,359 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 19:15:59,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:15:59,369 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:15:59,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:15:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 19:15:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 19:15:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:15:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-20 19:15:59,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-20 19:15:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:15:59,419 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-20 19:15:59,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:15:59,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:15:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-20 19:15:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:15:59,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:15:59,422 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:15:59,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:15:59,423 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:15:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:15:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-20 19:15:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:15:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453815140] [2024-09-20 19:15:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:15:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:15:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:15:59,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16862729] [2024-09-20 19:15:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:15:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:15:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:15:59,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:15:59,485 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 19:15:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:15:59,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:15:59,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:15:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:15:59,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:15:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:15:59,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453815140] [2024-09-20 19:15:59,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:15:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16862729] [2024-09-20 19:15:59,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16862729] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:15:59,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:15:59,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:15:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895279607] [2024-09-20 19:15:59,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:15:59,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:15:59,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:15:59,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:15:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:15:59,698 INFO L87 Difference]: Start difference. First operand 31 states and 41 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:15:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:15:59,786 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-20 19:15:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:15:59,787 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2024-09-20 19:15:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:15:59,789 INFO L225 Difference]: With dead ends: 47 [2024-09-20 19:15:59,790 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 19:15:59,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 19:15:59,791 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:15:59,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:15:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 19:15:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-20 19:15:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:15:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-20 19:15:59,809 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-20 19:15:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:15:59,810 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-20 19:15:59,810 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:15:59,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:15:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-20 19:15:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:15:59,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:15:59,812 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:15:59,829 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 19:16:00,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:00,017 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:00,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-20 19:16:00,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:00,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925255616] [2024-09-20 19:16:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959452998] [2024-09-20 19:16:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:00,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:00,059 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 19:16:00,060 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 19:16:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:00,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:16:00,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:16:00,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:16:00,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925255616] [2024-09-20 19:16:00,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959452998] [2024-09-20 19:16:00,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959452998] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:00,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:16:00,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:16:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873015687] [2024-09-20 19:16:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:00,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:16:00,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:16:00,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:16:00,219 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:16:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:00,310 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-20 19:16:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:16:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-20 19:16:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:00,312 INFO L225 Difference]: With dead ends: 51 [2024-09-20 19:16:00,312 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 19:16:00,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 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 19:16:00,313 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:00,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:16:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 19:16:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-20 19:16:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:16:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-20 19:16:00,333 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-20 19:16:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:00,333 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-20 19:16:00,334 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:16:00,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-20 19:16:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 19:16:00,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:00,339 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:00,353 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:16:00,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:00,540 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:00,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-20 19:16:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678677808] [2024-09-20 19:16:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:00,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605191642] [2024-09-20 19:16:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:00,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:00,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:00,583 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 19:16:00,585 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 19:16:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:00,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:16:00,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:16:00,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:16:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678677808] [2024-09-20 19:16:00,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605191642] [2024-09-20 19:16:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605191642] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:00,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:16:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:16:00,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004205997] [2024-09-20 19:16:00,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:00,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:16:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:16:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:16:00,723 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:16:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:00,793 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-20 19:16:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:16:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-20 19:16:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:00,796 INFO L225 Difference]: With dead ends: 73 [2024-09-20 19:16:00,799 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:16:00,799 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 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 19:16:00,800 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:00,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:16:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:16:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 19:16:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-20 19:16:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-20 19:16:00,831 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-20 19:16:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:00,832 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-20 19:16:00,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:16:00,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-20 19:16:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 19:16:00,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:00,837 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:00,854 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 19:16:01,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:01,038 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-20 19:16:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062782576] [2024-09-20 19:16:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:16:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:16:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:16:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:16:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:16:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:16:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:16:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 19:16:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:16:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062782576] [2024-09-20 19:16:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062782576] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:16:01,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:16:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255101627] [2024-09-20 19:16:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:01,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:16:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:16:01,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:16:01,245 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-20 19:16:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:01,298 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-20 19:16:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:16:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 48 [2024-09-20 19:16:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:01,301 INFO L225 Difference]: With dead ends: 75 [2024-09-20 19:16:01,302 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 19:16:01,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 19:16:01,303 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:01,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:16:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 19:16:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 19:16:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-20 19:16:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-20 19:16:01,328 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-20 19:16:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:01,329 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-20 19:16:01,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-20 19:16:01,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-20 19:16:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:16:01,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:01,331 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:01,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 19:16:01,331 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:01,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-20 19:16:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415523594] [2024-09-20 19:16:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:01,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:01,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916600453] [2024-09-20 19:16:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:01,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:01,375 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 19:16:01,378 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 19:16:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:01,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:16:01,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 19:16:01,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:16:01,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:01,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415523594] [2024-09-20 19:16:01,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916600453] [2024-09-20 19:16:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916600453] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:01,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:16:01,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:16:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286185858] [2024-09-20 19:16:01,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:01,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:16:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:16:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:16:01,547 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:16:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:01,617 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-20 19:16:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:16:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2024-09-20 19:16:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:01,620 INFO L225 Difference]: With dead ends: 83 [2024-09-20 19:16:01,620 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 19:16:01,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 19:16:01,622 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 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 19:16:01,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:16:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 19:16:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-20 19:16:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 19:16:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-20 19:16:01,649 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-20 19:16:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:01,651 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-20 19:16:01,652 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:16:01,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-20 19:16:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:16:01,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:01,653 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:01,666 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 19:16:01,856 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:01,857 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:01,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-20 19:16:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:01,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068049225] [2024-09-20 19:16:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:01,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:16:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:16:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:16:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:16:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:16:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:16:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:16:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 19:16:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 19:16:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:16:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:02,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068049225] [2024-09-20 19:16:02,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068049225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:16:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079239737] [2024-09-20 19:16:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:02,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:02,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:02,204 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 19:16:02,208 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 19:16:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:02,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:16:02,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 19:16:02,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:16:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079239737] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:02,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:16:02,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-20 19:16:02,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253688712] [2024-09-20 19:16:02,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:02,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:16:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:16:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:16:02,383 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 19:16:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:02,477 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-20 19:16:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:16:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2024-09-20 19:16:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:02,479 INFO L225 Difference]: With dead ends: 91 [2024-09-20 19:16:02,479 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 19:16:02,479 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:16:02,480 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:02,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 157 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:16:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 19:16:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-20 19:16:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 19:16:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-20 19:16:02,493 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-20 19:16:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:02,493 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-20 19:16:02,493 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 19:16:02,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-20 19:16:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:16:02,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:02,495 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:02,511 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 19:16:02,698 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:16:02,699 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:02,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-20 19:16:02,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:02,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302066521] [2024-09-20 19:16:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:02,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900499108] [2024-09-20 19:16:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:16:02,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:02,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:16:02,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:16:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:16:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:16:02,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:16:02,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 19:16:03,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:16:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:16:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:03,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302066521] [2024-09-20 19:16:03,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900499108] [2024-09-20 19:16:03,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900499108] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:16:03,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:16:03,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-20 19:16:03,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458662222] [2024-09-20 19:16:03,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:16:03,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:16:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:16:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:16:03,657 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 19:16:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:05,073 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2024-09-20 19:16:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:16:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2024-09-20 19:16:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:05,075 INFO L225 Difference]: With dead ends: 128 [2024-09-20 19:16:05,075 INFO L226 Difference]: Without dead ends: 126 [2024-09-20 19:16:05,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:16:05,076 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:05,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 252 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 19:16:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-20 19:16:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2024-09-20 19:16:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.150943396226415) internal successors, (61), 56 states have internal predecessors, (61), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 19:16:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2024-09-20 19:16:05,131 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 55 [2024-09-20 19:16:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:05,132 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2024-09-20 19:16:05,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 19:16:05,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2024-09-20 19:16:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 19:16:05,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:05,134 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:05,151 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:16:05,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:05,339 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:05,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-20 19:16:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:05,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653463998] [2024-09-20 19:16:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574679182] [2024-09-20 19:16:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:05,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:16:05,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:16:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:05,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 19:16:05,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:16:05,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:16:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-20 19:16:05,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:05,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653463998] [2024-09-20 19:16:05,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:05,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574679182] [2024-09-20 19:16:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574679182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:16:05,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:16:05,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-09-20 19:16:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824890658] [2024-09-20 19:16:05,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:16:05,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:16:05,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:16:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:16:05,900 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-20 19:16:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:06,760 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-09-20 19:16:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:16:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 60 [2024-09-20 19:16:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:06,763 INFO L225 Difference]: With dead ends: 119 [2024-09-20 19:16:06,764 INFO L226 Difference]: Without dead ends: 101 [2024-09-20 19:16:06,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:16:06,765 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:06,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 255 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:16:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-20 19:16:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2024-09-20 19:16:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 19:16:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-09-20 19:16:06,801 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 60 [2024-09-20 19:16:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:06,801 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-09-20 19:16:06,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-20 19:16:06,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-09-20 19:16:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 19:16:06,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:06,808 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:06,822 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:16:07,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:07,009 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1657370914, now seen corresponding path program 1 times [2024-09-20 19:16:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:07,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355325648] [2024-09-20 19:16:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:16:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891522611] [2024-09-20 19:16:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:07,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:16:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:16:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:16:07,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 19:16:07,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:16:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-20 19:16:07,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355325648] [2024-09-20 19:16:07,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:16:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891522611] [2024-09-20 19:16:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891522611] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:16:07,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:16:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-09-20 19:16:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140193499] [2024-09-20 19:16:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:07,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:16:07,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:16:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:16:07,337 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:16:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:07,448 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2024-09-20 19:16:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:16:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2024-09-20 19:16:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:07,450 INFO L225 Difference]: With dead ends: 92 [2024-09-20 19:16:07,450 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 19:16:07,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:16:07,451 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:07,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:16:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 19:16:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-09-20 19:16:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 19:16:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-09-20 19:16:07,489 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 68 [2024-09-20 19:16:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:07,490 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-09-20 19:16:07,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:16:07,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-09-20 19:16:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 19:16:07,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:07,493 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:07,510 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:16:07,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:07,698 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:07,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -335668690, now seen corresponding path program 1 times [2024-09-20 19:16:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385574468] [2024-09-20 19:16:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:16:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:16:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:16:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:16:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:16:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:16:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 19:16:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 19:16:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 19:16:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 19:16:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 19:16:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 19:16:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-20 19:16:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385574468] [2024-09-20 19:16:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385574468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:16:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340778924] [2024-09-20 19:16:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:07,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:07,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:07,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:16:07,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:16:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:07,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:16:07,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:16:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-20 19:16:08,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:16:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-20 19:16:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340778924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:16:08,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:16:08,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-09-20 19:16:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671395895] [2024-09-20 19:16:08,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:16:08,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:16:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:16:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:16:08,101 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 19:16:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:08,294 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-09-20 19:16:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:16:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2024-09-20 19:16:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:08,296 INFO L225 Difference]: With dead ends: 92 [2024-09-20 19:16:08,296 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:16:08,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:16:08,299 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:08,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 195 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:16:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:16:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:16:08,300 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 19:16:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:16:08,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2024-09-20 19:16:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:08,300 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:16:08,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 19:16:08,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:16:08,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:16:08,305 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:16:08,322 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 19:16:08,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:16:08,510 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:08,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:16:17,530 WARN L293 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:16:23,234 WARN L293 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 71 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:16:31,507 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 67 DAG size of output: 35 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-20 19:16:36,869 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:16:36,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:16:36 BoogieIcfgContainer [2024-09-20 19:16:36,885 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:16:36,885 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:16:36,885 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:16:36,885 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:16:36,886 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:15:58" (3/4) ... [2024-09-20 19:16:36,888 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:16:36,941 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:16:36,941 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:16:36,942 INFO L158 Benchmark]: Toolchain (without parser) took 38664.43ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 113.4MB in the beginning and 96.7MB in the end (delta: 16.7MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,942 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 121.6MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:16:36,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.86ms. Allocated memory is still 184.5MB. Free memory was 113.2MB in the beginning and 101.5MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,942 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.33ms. Allocated memory is still 184.5MB. Free memory was 101.5MB in the beginning and 100.6MB in the end (delta: 867.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,942 INFO L158 Benchmark]: Boogie Preprocessor took 52.07ms. Allocated memory is still 184.5MB. Free memory was 100.3MB in the beginning and 156.2MB in the end (delta: -55.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,942 INFO L158 Benchmark]: RCFGBuilder took 302.78ms. Allocated memory is still 184.5MB. Free memory was 156.2MB in the beginning and 142.5MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,943 INFO L158 Benchmark]: TraceAbstraction took 37976.92ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 141.8MB in the beginning and 98.8MB in the end (delta: 43.0MB). Peak memory consumption was 114.6MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,943 INFO L158 Benchmark]: Witness Printer took 55.94ms. Allocated memory is still 222.3MB. Free memory was 98.8MB in the beginning and 96.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:16:36,944 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 121.6MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.86ms. Allocated memory is still 184.5MB. Free memory was 113.2MB in the beginning and 101.5MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.33ms. Allocated memory is still 184.5MB. Free memory was 101.5MB in the beginning and 100.6MB in the end (delta: 867.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.07ms. Allocated memory is still 184.5MB. Free memory was 100.3MB in the beginning and 156.2MB in the end (delta: -55.8MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * RCFGBuilder took 302.78ms. Allocated memory is still 184.5MB. Free memory was 156.2MB in the beginning and 142.5MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 37976.92ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 141.8MB in the beginning and 98.8MB in the end (delta: 43.0MB). Peak memory consumption was 114.6MB. Max. memory is 16.1GB. * Witness Printer took 55.94ms. Allocated memory is still 222.3MB. Free memory was 98.8MB in the beginning and 96.7MB 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: 13]: 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 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.5s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1681 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1310 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1040 IncrementalHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 371 mSDtfsCounter, 1040 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 736 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=8, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1016 NumberOfCodeBlocks, 1016 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 909 ConstructedInterpolants, 0 QuantifiedInterpolants, 2695 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1156 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 1091/1171 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: 35]: Loop Invariant Derived loop invariant: (((((b == (((__int128) q * x) + ((__int128) y * s))) && (1 <= x)) && (a == (((__int128) y * r) + ((__int128) p * x)))) && (1 <= y)) && (((__int128) p * s) == (((__int128) q * r) + 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:16:36,973 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