./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i -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 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:29:25,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:29:25,694 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:29:25,699 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:29:25,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:29:25,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:29:25,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:29:25,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:29:25,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:29:25,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:29:25,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:29:25,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:29:25,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:29:25,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:29:25,725 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:29:25,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:29:25,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:29:25,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:29:25,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:29:25,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:29:25,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:29:25,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:29:25,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:29:25,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:29:25,730 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:29:25,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:29:25,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:29:25,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:29:25,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:29:25,733 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:29:25,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:29:25,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:29:25,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:29:25,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:29:25,937 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:29:25,937 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:29:25,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2024-09-20 12:29:27,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:29:27,330 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:29:27,333 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2024-09-20 12:29:27,340 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c302d8e72/5d2d2e65ca404ac2ba266925c3a3ac2f/FLAGd70353a49 [2024-09-20 12:29:27,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c302d8e72/5d2d2e65ca404ac2ba266925c3a3ac2f [2024-09-20 12:29:27,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:29:27,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:29:27,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:29:27,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:29:27,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:29:27,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c3cc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27, skipping insertion in model container [2024-09-20 12:29:27,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,379 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:29:27,501 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/divbin_valuebound20.i[950,963] [2024-09-20 12:29:27,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:29:27,519 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:29:27,527 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/divbin_valuebound20.i[950,963] [2024-09-20 12:29:27,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:29:27,545 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:29:27,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27 WrapperNode [2024-09-20 12:29:27,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:29:27,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:29:27,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:29:27,547 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:29:27,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,562 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:29:27,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:29:27,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:29:27,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:29:27,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:29:27,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,572 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,584 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 12:29:27,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:29:27,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:29:27,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:29:27,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:29:27,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (1/1) ... [2024-09-20 12:29:27,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:29:27,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:29:27,627 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 12:29:27,629 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 12:29:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:29:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:29:27,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:29:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:29:27,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:29:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:29:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:29:27,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:29:27,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:29:27,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:29:27,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:29:27,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:29:27,713 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:29:27,715 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:29:27,818 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:29:27,818 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:29:27,835 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:29:27,836 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:29:27,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:29:27 BoogieIcfgContainer [2024-09-20 12:29:27,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:29:27,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:29:27,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:29:27,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:29:27,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:29:27" (1/3) ... [2024-09-20 12:29:27,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a227a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:29:27, skipping insertion in model container [2024-09-20 12:29:27,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:29:27" (2/3) ... [2024-09-20 12:29:27,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a227a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:29:27, skipping insertion in model container [2024-09-20 12:29:27,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:29:27" (3/3) ... [2024-09-20 12:29:27,842 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2024-09-20 12:29:27,854 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:29:27,855 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:29:27,898 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:29:27,903 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;@7f9e28a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:29:27,903 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:29:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:29:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:29:27,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:27,915 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, 1] [2024-09-20 12:29:27,916 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash -923394275, now seen corresponding path program 1 times [2024-09-20 12:29:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:27,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347854399] [2024-09-20 12:29:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:27,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:29:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:29:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:29:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:29:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:29:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,091 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 12:29:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:29:28,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347854399] [2024-09-20 12:29:28,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347854399] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:29:28,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:29:28,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:29:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760880137] [2024-09-20 12:29:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:29:28,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:29:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:29:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:29:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:29:28,127 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12:29:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:29:28,150 INFO L93 Difference]: Finished difference Result 58 states and 87 transitions. [2024-09-20 12:29:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:29:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 33 [2024-09-20 12:29:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:29:28,157 INFO L225 Difference]: With dead ends: 58 [2024-09-20 12:29:28,157 INFO L226 Difference]: Without dead ends: 28 [2024-09-20 12:29:28,160 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 12:29:28,164 INFO L434 NwaCegarLoop]: 36 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, 36 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 12:29:28,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:29:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-20 12:29:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-20 12:29:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:29:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-20 12:29:28,197 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 33 [2024-09-20 12:29:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:29:28,198 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-20 12:29:28,198 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12:29:28,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-20 12:29:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:29:28,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:28,202 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, 1, 1] [2024-09-20 12:29:28,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:29:28,203 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:28,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1193042891, now seen corresponding path program 1 times [2024-09-20 12:29:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:28,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600481776] [2024-09-20 12:29:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:28,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:29:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735742332] [2024-09-20 12:29:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:28,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:29:28,306 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 12:29:28,307 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 12:29:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:28,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 12:29:28,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:29:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:29:28,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:29:28,686 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 12:29:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:29:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600481776] [2024-09-20 12:29:28,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:29:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735742332] [2024-09-20 12:29:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735742332] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:29:28,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:29:28,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2024-09-20 12:29:28,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34449434] [2024-09-20 12:29:28,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:29:28,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:29:28,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:29:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:29:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:29:28,691 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:29:32,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-20 12:29:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:29:32,758 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-09-20 12:29:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:29:32,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 34 [2024-09-20 12:29:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:29:32,763 INFO L225 Difference]: With dead ends: 38 [2024-09-20 12:29:32,764 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 12:29:32,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:29:32,765 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:29:32,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2024-09-20 12:29:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 12:29:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 12:29:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:29:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-09-20 12:29:32,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2024-09-20 12:29:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:29:32,782 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-09-20 12:29:32,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:29:32,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-09-20 12:29:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:29:32,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:32,783 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-09-20 12:29:32,796 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:29:32,984 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 12:29:32,984 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:32,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash 513117096, now seen corresponding path program 1 times [2024-09-20 12:29:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:32,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426912876] [2024-09-20 12:29:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:29:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:29:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:29:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:29:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:29:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:29:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:29:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:29:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426912876] [2024-09-20 12:29:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426912876] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:29:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:29:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 12:29:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878739859] [2024-09-20 12:29:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:29:33,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:29:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:29:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:29:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:29:33,457 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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 12:29:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:29:33,492 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-09-20 12:29:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:29:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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 42 [2024-09-20 12:29:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:29:33,494 INFO L225 Difference]: With dead ends: 51 [2024-09-20 12:29:33,494 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 12:29:33,494 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:29:33,495 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:29:33,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:29:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 12:29:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-20 12:29:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:29:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-20 12:29:33,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 42 [2024-09-20 12:29:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:29:33,509 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-20 12:29:33,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 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 12:29:33,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-20 12:29:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:29:33,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:33,511 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-09-20 12:29:33,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:29:33,512 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 980542403, now seen corresponding path program 1 times [2024-09-20 12:29:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708954067] [2024-09-20 12:29:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:29:33,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506715218] [2024-09-20 12:29:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:33,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:33,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:29:33,545 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 12:29:33,546 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 12:29:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:33,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:29:33,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:29:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 12:29:33,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:29:37,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:29:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708954067] [2024-09-20 12:29:37,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:29:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506715218] [2024-09-20 12:29:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506715218] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:29:37,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:29:37,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-20 12:29:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870703108] [2024-09-20 12:29:37,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:29:37,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:29:37,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:29:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:29:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2024-09-20 12:29:37,884 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 12:29:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:29:38,031 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-09-20 12:29:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:29:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-09-20 12:29:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:29:38,032 INFO L225 Difference]: With dead ends: 52 [2024-09-20 12:29:38,032 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 12:29:38,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2024-09-20 12:29:38,043 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:29:38,044 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 148 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:29:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 12:29:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-09-20 12:29:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:29:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-09-20 12:29:38,060 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 44 [2024-09-20 12:29:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:29:38,062 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-09-20 12:29:38,062 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 12:29:38,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-09-20 12:29:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 12:29:38,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:38,064 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 12:29:38,075 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 12:29:38,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:38,270 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:38,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:38,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2109238368, now seen corresponding path program 2 times [2024-09-20 12:29:38,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:38,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868209754] [2024-09-20 12:29:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:29:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:29:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:29:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:29:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:29:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:29:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:29:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:29:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 12:29:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:29:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868209754] [2024-09-20 12:29:38,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868209754] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:29:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019328345] [2024-09-20 12:29:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:29:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:29:38,662 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 12:29:38,662 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 12:29:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:29:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:29:38,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 12:29:38,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:29:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 12:29:39,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:29:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 12:29:39,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019328345] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:29:39,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:29:39,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 21 [2024-09-20 12:29:39,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077563988] [2024-09-20 12:29:39,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:29:39,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:29:39,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:29:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:29:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:29:39,580 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 9 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 12:29:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:29:40,038 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2024-09-20 12:29:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 12:29:40,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 9 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) Word has length 52 [2024-09-20 12:29:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:29:40,040 INFO L225 Difference]: With dead ends: 83 [2024-09-20 12:29:40,041 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 12:29:40,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:29:40,042 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:29:40,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 207 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:29:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 12:29:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-09-20 12:29:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:29:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-09-20 12:29:40,052 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 52 [2024-09-20 12:29:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:29:40,052 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-09-20 12:29:40,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 9 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 12:29:40,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-09-20 12:29:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 12:29:40,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:29:40,053 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2024-09-20 12:29:40,060 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:29:40,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:40,258 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:29:40,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:29:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -860568069, now seen corresponding path program 3 times [2024-09-20 12:29:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:29:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873504035] [2024-09-20 12:29:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:29:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:29:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:29:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136619265] [2024-09-20 12:29:40,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:29:40,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:29:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:29:40,319 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 12:29:40,320 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 12:29:40,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:29:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:29:40,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 12:29:40,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:29:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 12:29:42,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:30:00,664 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:30:28,319 WARN L293 SmtUtils]: Spent 22.69s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-09-20 12:30:35,014 WARN L293 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:30:48,757 WARN L293 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 22 DAG size of output: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:30:58,856 WARN L293 SmtUtils]: Spent 9.81s on a formula simplification. DAG size of input: 36 DAG size of output: 23 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-09-20 12:31:06,269 WARN L293 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-09-20 12:31:50,544 WARN L293 SmtUtils]: Spent 26.75s on a formula simplification. DAG size of input: 60 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:32:06,432 WARN L293 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:32:23,276 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:32:39,299 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:33:07,390 WARN L293 SmtUtils]: Spent 28.09s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:33:27,508 WARN L293 SmtUtils]: Spent 20.12s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:33:35,625 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (mod (* c_main_~b~0 c_main_~q~0) 1073741824)) (.cse2 (mod c_main_~b~0 1073741824))) (let ((.cse3 (mod c_main_~B~0 4294967296)) (.cse0 (* (mod (* .cse2 c_main_~q~0) 1073741824) 4)) (.cse1 (* 4294967292 .cse5)) (.cse4 (* .cse2 4))) (or (< 4294967295 (+ .cse0 (mod (+ .cse1 c_main_~A~0) 4294967296))) (= (* .cse2 2) .cse3) (= .cse4 .cse3) (< (+ 4294967294 .cse0) (+ (mod (+ .cse1 (* .cse2 c_main_~q~0 4) 4294967295) 4294967296) (mod c_main_~A~0 4294967296))) (< .cse4 (+ (mod (+ .cse4 (* c_main_~A~0 4294967295) 4294967295 (* 4 .cse5)) 4294967296) (* 2 (mod c_main_~b~0 2147483648)) 1))))) is different from true [2024-09-20 12:33:51,662 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:33:56,802 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)