./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_unwindbound5.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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --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-6908dde-m [2024-09-24 23:30:13,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:30:13,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:30:13,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:30:13,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:30:13,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:30:13,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:30:13,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:30:13,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:30:13,982 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:30:13,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:30:13,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:30:13,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:30:13,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:30:13,986 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:30:13,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:30:13,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:30:13,987 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:30:13,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:30:13,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:30:13,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:30:13,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:30:13,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:30:13,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:30:13,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:30:13,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:30:13,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:30:13,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:30:13,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:30:13,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:30:13,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:30:13,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:30:13,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:30:13,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:30:13,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:30:13,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:30:13,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:30:13,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:30:13,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:30:13,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:30:13,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:30:13,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:30:13,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:30:14,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:30:14,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:30:14,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:30:14,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:30:14,270 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:30:14,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-24 23:30:15,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:30:15,919 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:30:15,920 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-24 23:30:15,929 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a82d89760/6680ac1d22db4fe0817abc445ff5dcfa/FLAGe6c4041cd [2024-09-24 23:30:16,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a82d89760/6680ac1d22db4fe0817abc445ff5dcfa [2024-09-24 23:30:16,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:30:16,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:30:16,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:16,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:30:16,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:30:16,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e89ceed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16, skipping insertion in model container [2024-09-24 23:30:16,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:30:16,470 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_unwindbound5.i[950,963] [2024-09-24 23:30:16,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:16,496 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:30:16,507 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_unwindbound5.i[950,963] [2024-09-24 23:30:16,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:16,528 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:30:16,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16 WrapperNode [2024-09-24 23:30:16,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:16,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:16,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:30:16,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:30:16,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,548 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:30:16,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:16,549 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:30:16,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:30:16,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:30:16,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,559 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,570 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]. [2024-09-24 23:30:16,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:30:16,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:30:16,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:30:16,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:30:16,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (1/1) ... [2024-09-24 23:30:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:30:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:16,609 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) [2024-09-24 23:30:16,611 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 [2024-09-24 23:30:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:30:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:30:16,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:30:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:30:16,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:30:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:30:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:30:16,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:30:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:30:16,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:30:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:30:16,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:30:16,710 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:30:16,711 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:30:16,853 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:30:16,853 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:30:16,877 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:30:16,877 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:30:16,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:16 BoogieIcfgContainer [2024-09-24 23:30:16,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:30:16,880 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:30:16,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:30:16,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:30:16,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:30:16" (1/3) ... [2024-09-24 23:30:16,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f68780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:16, skipping insertion in model container [2024-09-24 23:30:16,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:16" (2/3) ... [2024-09-24 23:30:16,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f68780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:16, skipping insertion in model container [2024-09-24 23:30:16,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:16" (3/3) ... [2024-09-24 23:30:16,887 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2024-09-24 23:30:16,903 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:30:16,904 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:30:16,968 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:30:16,976 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;@4f263a2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:30:16,976 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:30:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-24 23:30:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-24 23:30:16,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:16,990 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:16,991 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:16,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1602480078, now seen corresponding path program 1 times [2024-09-24 23:30:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980254821] [2024-09-24 23:30:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:17,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980254821] [2024-09-24 23:30:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980254821] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:30:17,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576606455] [2024-09-24 23:30:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:17,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:30:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:30:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:30:17,215 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:17,319 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2024-09-24 23:30:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:30:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-24 23:30:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:17,328 INFO L225 Difference]: With dead ends: 57 [2024-09-24 23:30:17,328 INFO L226 Difference]: Without dead ends: 28 [2024-09-24 23:30:17,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:30:17,333 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:17,334 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-24 23:30:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-24 23:30:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:30:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-24 23:30:17,372 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2024-09-24 23:30:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:17,372 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-24 23:30:17,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-24 23:30:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 23:30:17,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:17,378 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:17,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:30:17,378 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:17,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 610811680, now seen corresponding path program 1 times [2024-09-24 23:30:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216735034] [2024-09-24 23:30:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216735034] [2024-09-24 23:30:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216735034] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:30:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742419735] [2024-09-24 23:30:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:17,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:30:17,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:30:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:30:17,700 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:17,810 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-24 23:30:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:30:17,811 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-24 23:30:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:17,812 INFO L225 Difference]: With dead ends: 41 [2024-09-24 23:30:17,813 INFO L226 Difference]: Without dead ends: 29 [2024-09-24 23:30:17,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:30:17,815 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:17,816 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-24 23:30:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-24 23:30:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:30:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-24 23:30:17,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2024-09-24 23:30:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:17,831 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-24 23:30:17,831 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-24 23:30:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:30:17,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:17,834 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:17,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:30:17,835 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:17,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1424295131, now seen corresponding path program 1 times [2024-09-24 23:30:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229148756] [2024-09-24 23:30:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:17,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229148756] [2024-09-24 23:30:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229148756] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:18,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:18,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:30:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616414432] [2024-09-24 23:30:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:18,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:30:18,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:18,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:30:18,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:30:18,043 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:18,148 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-09-24 23:30:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:30:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-24 23:30:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:18,151 INFO L225 Difference]: With dead ends: 40 [2024-09-24 23:30:18,151 INFO L226 Difference]: Without dead ends: 33 [2024-09-24 23:30:18,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:30:18,152 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:18,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-24 23:30:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-24 23:30:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:30:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-24 23:30:18,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2024-09-24 23:30:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:18,162 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-24 23:30:18,162 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:18,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-24 23:30:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:30:18,163 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:18,164 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:18,164 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:30:18,164 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:18,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1426082591, now seen corresponding path program 1 times [2024-09-24 23:30:18,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:18,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556409331] [2024-09-24 23:30:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:18,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462022376] [2024-09-24 23:30:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:18,195 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) [2024-09-24 23:30:18,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:30:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:30:18,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:18,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:30:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556409331] [2024-09-24 23:30:18,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462022376] [2024-09-24 23:30:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462022376] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:18,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:18,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:30:18,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334425101] [2024-09-24 23:30:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:18,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:30:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:30:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:30:18,360 INFO L87 Difference]: Start difference. First operand 32 states and 39 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-24 23:30:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:18,420 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-09-24 23:30:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:30:18,421 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-24 23:30:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:18,422 INFO L225 Difference]: With dead ends: 44 [2024-09-24 23:30:18,422 INFO L226 Difference]: Without dead ends: 41 [2024-09-24 23:30:18,422 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:30:18,423 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:18,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:30:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-24 23:30:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-24 23:30:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:30:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-09-24 23:30:18,439 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2024-09-24 23:30:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:18,439 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-09-24 23:30:18,440 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-24 23:30:18,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-09-24 23:30:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:30:18,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:18,441 INFO L216 NwaCegarLoop]: trace histogram [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, 1] [2024-09-24 23:30:18,458 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:30:18,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:18,646 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:18,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1945714758, now seen corresponding path program 1 times [2024-09-24 23:30:18,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:18,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295350726] [2024-09-24 23:30:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:18,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:30:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:18,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295350726] [2024-09-24 23:30:18,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295350726] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:18,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538869428] [2024-09-24 23:30:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:18,862 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) [2024-09-24 23:30:18,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:30:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:18,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:30:18,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:18,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538869428] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:19,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:19,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-24 23:30:19,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810903045] [2024-09-24 23:30:19,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:19,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:30:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:30:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:30:19,095 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-24 23:30:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:19,305 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2024-09-24 23:30:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:30:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 34 [2024-09-24 23:30:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:19,308 INFO L225 Difference]: With dead ends: 111 [2024-09-24 23:30:19,310 INFO L226 Difference]: Without dead ends: 104 [2024-09-24 23:30:19,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:30:19,311 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:19,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-24 23:30:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2024-09-24 23:30:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:30:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2024-09-24 23:30:19,339 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 34 [2024-09-24 23:30:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:19,340 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2024-09-24 23:30:19,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-24 23:30:19,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2024-09-24 23:30:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:30:19,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:19,343 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-24 23:30:19,360 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:30:19,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:19,544 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:19,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1947502218, now seen corresponding path program 1 times [2024-09-24 23:30:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388459188] [2024-09-24 23:30:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:19,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:19,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:19,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:19,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:30:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:19,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388459188] [2024-09-24 23:30:19,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388459188] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:19,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:19,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:30:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592145176] [2024-09-24 23:30:19,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:19,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:30:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:30:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:30:19,770 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:30:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:19,856 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2024-09-24 23:30:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:30:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-24 23:30:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:19,860 INFO L225 Difference]: With dead ends: 145 [2024-09-24 23:30:19,860 INFO L226 Difference]: Without dead ends: 75 [2024-09-24 23:30:19,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:30:19,862 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:19,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-24 23:30:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-24 23:30:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:30:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-09-24 23:30:19,899 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 34 [2024-09-24 23:30:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:19,900 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-09-24 23:30:19,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:30:19,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-09-24 23:30:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:30:19,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:19,903 INFO L216 NwaCegarLoop]: trace histogram [2, 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] [2024-09-24 23:30:19,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-24 23:30:19,903 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:19,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1464105851, now seen corresponding path program 1 times [2024-09-24 23:30:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:19,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751242228] [2024-09-24 23:30:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:30:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:30:20,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:20,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751242228] [2024-09-24 23:30:20,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751242228] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:20,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592283120] [2024-09-24 23:30:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:20,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:20,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:20,039 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) [2024-09-24 23:30:20,041 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:30:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:30:20,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:30:20,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:30:20,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592283120] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:20,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:20,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-24 23:30:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453802165] [2024-09-24 23:30:20,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:20,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:30:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:30:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:30:20,211 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-24 23:30:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:20,336 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2024-09-24 23:30:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:30:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 36 [2024-09-24 23:30:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:20,340 INFO L225 Difference]: With dead ends: 128 [2024-09-24 23:30:20,340 INFO L226 Difference]: Without dead ends: 77 [2024-09-24 23:30:20,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:30:20,341 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:20,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-24 23:30:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-24 23:30:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 60 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:30:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2024-09-24 23:30:20,359 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 36 [2024-09-24 23:30:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:20,359 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2024-09-24 23:30:20,359 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-24 23:30:20,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2024-09-24 23:30:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-24 23:30:20,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:20,361 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-09-24 23:30:20,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:30:20,565 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-24 23:30:20,566 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1516658666, now seen corresponding path program 1 times [2024-09-24 23:30:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:20,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468438057] [2024-09-24 23:30:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:20,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676029774] [2024-09-24 23:30:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:20,606 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) [2024-09-24 23:30:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:30:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:20,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 23:30:20,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:30:20,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468438057] [2024-09-24 23:30:33,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676029774] [2024-09-24 23:30:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676029774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:33,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:30:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-24 23:30:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874645945] [2024-09-24 23:30:33,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:33,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 23:30:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 23:30:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=101, Unknown=3, NotChecked=0, Total=132 [2024-09-24 23:30:33,335 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:30:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:33,453 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2024-09-24 23:30:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:30:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-24 23:30:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:33,455 INFO L225 Difference]: With dead ends: 90 [2024-09-24 23:30:33,455 INFO L226 Difference]: Without dead ends: 86 [2024-09-24 23:30:33,455 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=34, Invalid=119, Unknown=3, NotChecked=0, Total=156 [2024-09-24 23:30:33,456 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:33,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-24 23:30:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2024-09-24 23:30:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-24 23:30:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-09-24 23:30:33,469 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 37 [2024-09-24 23:30:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:33,470 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-09-24 23:30:33,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:30:33,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-09-24 23:30:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-24 23:30:33,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:33,472 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:33,479 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:30:33,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:33,676 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:33,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1803442657, now seen corresponding path program 2 times [2024-09-24 23:30:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223868418] [2024-09-24 23:30:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:30:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-24 23:30:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:30:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-24 23:30:34,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223868418] [2024-09-24 23:30:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223868418] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802879263] [2024-09-24 23:30:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:30:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:34,384 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) [2024-09-24 23:30:34,385 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:30:34,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:30:34,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:30:34,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:30:34,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:30:35,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:30:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802879263] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:36,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:36,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 24 [2024-09-24 23:30:36,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936253144] [2024-09-24 23:30:36,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:36,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:30:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:30:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:30:36,369 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-24 23:30:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:37,894 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2024-09-24 23:30:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:30:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 46 [2024-09-24 23:30:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:37,896 INFO L225 Difference]: With dead ends: 118 [2024-09-24 23:30:37,896 INFO L226 Difference]: Without dead ends: 65 [2024-09-24 23:30:37,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:30:37,898 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:37,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 245 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-24 23:30:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-24 23:30:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-09-24 23:30:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-24 23:30:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-09-24 23:30:37,921 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 46 [2024-09-24 23:30:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:37,922 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-09-24 23:30:37,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-24 23:30:37,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-09-24 23:30:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-24 23:30:37,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:37,925 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:37,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:30:38,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:38,126 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:38,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash 182266171, now seen corresponding path program 1 times [2024-09-24 23:30:38,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:38,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088153070] [2024-09-24 23:30:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:38,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328909119] [2024-09-24 23:30:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:38,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:38,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:38,198 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) [2024-09-24 23:30:38,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:30:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:38,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-24 23:30:38,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-24 23:30:40,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:31:39,869 WARN L293 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:32:11,590 WARN L293 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:32:21,321 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:33:02,092 WARN L293 SmtUtils]: Spent 8.46s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:33:08,620 WARN L293 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:33:30,934 WARN L293 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:34:31,003 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:34:44,549 WARN L293 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)