./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 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/loops-crafted-1/in-de32.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:26:57,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:26:57,276 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:26:57,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:26:57,281 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:26:57,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:26:57,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:26:57,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:26:57,315 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:26:57,315 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:26:57,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:26:57,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:26:57,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:26:57,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:26:57,319 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:26:57,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:26:57,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:26:57,320 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:26:57,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:26:57,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:26:57,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:26:57,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:26:57,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:26:57,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:26:57,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:26:57,328 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:26:57,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:26:57,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:26:57,329 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:26:57,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:26:57,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:26:57,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:26:57,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:26:57,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:26:57,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:26:57,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:26:57,331 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:26:57,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:26:57,332 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:26:57,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:26:57,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:26:57,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:26:57,334 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 -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:26:57,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:26:57,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:26:57,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:26:57,681 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:26:57,681 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:26:57,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-25 10:26:59,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:26:59,392 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:26:59,392 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-25 10:26:59,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1463a227d/c851e79d541f4c69b1df25c8ca28e9d6/FLAGef8794794 [2024-09-25 10:26:59,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1463a227d/c851e79d541f4c69b1df25c8ca28e9d6 [2024-09-25 10:26:59,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:26:59,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:26:59,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:26:59,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:26:59,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:26:59,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c1d5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59, skipping insertion in model container [2024-09-25 10:26:59,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,438 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:26:59,579 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/loops-crafted-1/in-de32.c[368,381] [2024-09-25 10:26:59,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:26:59,614 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:26:59,632 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/loops-crafted-1/in-de32.c[368,381] [2024-09-25 10:26:59,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:26:59,657 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:26:59,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59 WrapperNode [2024-09-25 10:26:59,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:26:59,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:26:59,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:26:59,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:26:59,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,691 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:26:59,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:26:59,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:26:59,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:26:59,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:26:59,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,703 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,715 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]. [2024-09-25 10:26:59,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:26:59,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:26:59,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:26:59,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:26:59,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (1/1) ... [2024-09-25 10:26:59,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:26:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:59,773 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) [2024-09-25 10:26:59,776 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 [2024-09-25 10:26:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:26:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:26:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:26:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:26:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:26:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:26:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:26:59,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:26:59,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:26:59,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:26:59,884 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:26:59,886 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:27:00,043 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-25 10:27:00,044 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:27:00,072 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:27:00,072 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 10:27:00,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:27:00 BoogieIcfgContainer [2024-09-25 10:27:00,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:27:00,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:27:00,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:27:00,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:27:00,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:26:59" (1/3) ... [2024-09-25 10:27:00,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:27:00, skipping insertion in model container [2024-09-25 10:27:00,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:59" (2/3) ... [2024-09-25 10:27:00,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:27:00, skipping insertion in model container [2024-09-25 10:27:00,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:27:00" (3/3) ... [2024-09-25 10:27:00,082 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2024-09-25 10:27:00,099 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:27:00,099 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:27:00,158 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:27:00,166 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;@5298ec29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:27:00,166 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:27:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:27:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:27:00,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:00,178 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:00,179 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-25 10:27:00,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268800549] [2024-09-25 10:27:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:00,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268800549] [2024-09-25 10:27:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268800549] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:27:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:27:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:27:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199443734] [2024-09-25 10:27:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:00,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:27:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:27:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:27:00,394 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:00,416 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-25 10:27:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:27:00,419 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:27:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:00,425 INFO L225 Difference]: With dead ends: 34 [2024-09-25 10:27:00,425 INFO L226 Difference]: Without dead ends: 14 [2024-09-25 10:27:00,428 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:27:00,431 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:00,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-25 10:27:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-25 10:27:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-25 10:27:00,460 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-25 10:27:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:00,461 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-25 10:27:00,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-25 10:27:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:27:00,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:00,463 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:00,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:27:00,463 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:00,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-25 10:27:00,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:00,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049126607] [2024-09-25 10:27:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:00,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049126607] [2024-09-25 10:27:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049126607] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:27:00,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:27:00,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:27:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727372984] [2024-09-25 10:27:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:00,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:27:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:27:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:27:00,732 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:00,858 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-09-25 10:27:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:27:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:27:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:00,862 INFO L225 Difference]: With dead ends: 21 [2024-09-25 10:27:00,862 INFO L226 Difference]: Without dead ends: 16 [2024-09-25 10:27:00,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:27:00,863 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:00,864 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-25 10:27:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-25 10:27:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-25 10:27:00,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-09-25 10:27:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:00,880 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-25 10:27:00,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-25 10:27:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:27:00,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:00,881 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:00,882 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:27:00,882 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:00,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-25 10:27:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005794400] [2024-09-25 10:27:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005794400] [2024-09-25 10:27:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005794400] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:27:00,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:27:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:27:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567685412] [2024-09-25 10:27:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:00,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:27:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:27:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:27:00,993 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:01,025 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-25 10:27:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:27:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:27:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:01,028 INFO L225 Difference]: With dead ends: 28 [2024-09-25 10:27:01,028 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 10:27:01,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:27:01,030 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:01,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 10:27:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-25 10:27:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-25 10:27:01,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-25 10:27:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:01,045 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-25 10:27:01,045 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-25 10:27:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:27:01,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:01,049 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:01,049 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 10:27:01,050 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1074026954, now seen corresponding path program 1 times [2024-09-25 10:27:01,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:01,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138968812] [2024-09-25 10:27:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138968812] [2024-09-25 10:27:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138968812] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:27:01,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:27:01,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-25 10:27:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231264568] [2024-09-25 10:27:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:01,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 10:27:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 10:27:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 10:27:01,160 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:01,204 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-09-25 10:27:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 10:27:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:27:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:01,207 INFO L225 Difference]: With dead ends: 26 [2024-09-25 10:27:01,207 INFO L226 Difference]: Without dead ends: 17 [2024-09-25 10:27:01,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:27:01,208 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:01,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-25 10:27:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-25 10:27:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-25 10:27:01,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-09-25 10:27:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:01,217 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-25 10:27:01,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-25 10:27:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-25 10:27:01,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:01,220 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:01,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-25 10:27:01,220 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:01,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash 161814611, now seen corresponding path program 1 times [2024-09-25 10:27:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800714656] [2024-09-25 10:27:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800714656] [2024-09-25 10:27:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800714656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355451330] [2024-09-25 10:27:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:01,364 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) [2024-09-25 10:27:01,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:27:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:27:01,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:01,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355451330] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:01,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:27:01,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-25 10:27:01,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801655151] [2024-09-25 10:27:01,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:01,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 10:27:01,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 10:27:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:01,539 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:01,567 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-25 10:27:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 10:27:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-25 10:27:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:01,568 INFO L225 Difference]: With dead ends: 23 [2024-09-25 10:27:01,568 INFO L226 Difference]: Without dead ends: 16 [2024-09-25 10:27:01,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:01,571 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:01,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-25 10:27:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-25 10:27:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-25 10:27:01,578 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-09-25 10:27:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:01,579 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-25 10:27:01,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:01,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-25 10:27:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-25 10:27:01,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:01,581 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:01,598 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:27:01,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:01,782 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:01,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1564643010, now seen corresponding path program 1 times [2024-09-25 10:27:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:01,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178868776] [2024-09-25 10:27:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:01,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178868776] [2024-09-25 10:27:01,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178868776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575601372] [2024-09-25 10:27:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:01,904 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) [2024-09-25 10:27:01,906 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:27:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:01,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:27:01,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:01,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575601372] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:02,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:27:02,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-25 10:27:02,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951501100] [2024-09-25 10:27:02,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:27:02,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 10:27:02,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 10:27:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:02,045 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:02,067 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-25 10:27:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 10:27:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-25 10:27:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:02,069 INFO L225 Difference]: With dead ends: 22 [2024-09-25 10:27:02,069 INFO L226 Difference]: Without dead ends: 17 [2024-09-25 10:27:02,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:02,070 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:02,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-25 10:27:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-25 10:27:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-09-25 10:27:02,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2024-09-25 10:27:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:02,079 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-09-25 10:27:02,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-09-25 10:27:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 10:27:02,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:02,081 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:02,098 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:02,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:27:02,285 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:02,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-25 10:27:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:02,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708940923] [2024-09-25 10:27:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:02,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:02,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708940923] [2024-09-25 10:27:02,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708940923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985804555] [2024-09-25 10:27:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:02,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:02,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:02,474 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) [2024-09-25 10:27:02,476 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:27:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:27:02,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:02,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985804555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:02,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-25 10:27:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801672382] [2024-09-25 10:27:02,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:02,644 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:27:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:27:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:02,645 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:02,694 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-25 10:27:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:27:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-25 10:27:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:02,695 INFO L225 Difference]: With dead ends: 25 [2024-09-25 10:27:02,695 INFO L226 Difference]: Without dead ends: 20 [2024-09-25 10:27:02,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:27:02,696 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:02,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:27:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-25 10:27:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-25 10:27:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-09-25 10:27:02,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2024-09-25 10:27:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:02,704 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-09-25 10:27:02,706 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:02,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-09-25 10:27:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:27:02,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:02,707 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:02,728 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:27:02,907 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 [2024-09-25 10:27:02,908 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:02,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1520587586, now seen corresponding path program 2 times [2024-09-25 10:27:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:02,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158887168] [2024-09-25 10:27:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:02,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:02,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158887168] [2024-09-25 10:27:02,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158887168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:02,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319031882] [2024-09-25 10:27:02,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:02,995 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) [2024-09-25 10:27:02,997 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:27:03,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:03,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:27:03,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:03,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319031882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:03,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-09-25 10:27:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120750028] [2024-09-25 10:27:03,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:03,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:27:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:27:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:27:03,144 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:03,245 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-09-25 10:27:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:27:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-25 10:27:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:03,250 INFO L225 Difference]: With dead ends: 60 [2024-09-25 10:27:03,250 INFO L226 Difference]: Without dead ends: 52 [2024-09-25 10:27:03,250 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:27:03,251 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:03,251 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-25 10:27:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-25 10:27:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-09-25 10:27:03,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2024-09-25 10:27:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:03,269 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-09-25 10:27:03,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-09-25 10:27:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:27:03,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:03,270 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:03,289 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:03,471 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 [2024-09-25 10:27:03,471 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:03,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2058594995, now seen corresponding path program 3 times [2024-09-25 10:27:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180805857] [2024-09-25 10:27:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:03,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:03,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180805857] [2024-09-25 10:27:03,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180805857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:03,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382326883] [2024-09-25 10:27:03,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:03,559 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) [2024-09-25 10:27:03,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:27:03,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-25 10:27:03,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:03,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:27:03,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:03,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382326883] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:03,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-25 10:27:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788238138] [2024-09-25 10:27:03,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:03,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 10:27:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 10:27:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:27:03,733 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:03,921 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-25 10:27:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:27:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-25 10:27:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:03,922 INFO L225 Difference]: With dead ends: 56 [2024-09-25 10:27:03,922 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 10:27:03,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:27:03,923 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:03,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 10:27:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-25 10:27:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-09-25 10:27:03,940 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2024-09-25 10:27:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:03,940 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-09-25 10:27:03,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:03,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-09-25 10:27:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 10:27:03,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:03,941 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:03,954 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:04,141 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 [2024-09-25 10:27:04,142 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:04,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 4 times [2024-09-25 10:27:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754483031] [2024-09-25 10:27:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:04,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754483031] [2024-09-25 10:27:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754483031] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378630000] [2024-09-25 10:27:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:04,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:04,302 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) [2024-09-25 10:27:04,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:27:04,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:04,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:27:04,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:04,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:04,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378630000] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:04,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:04,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-25 10:27:04,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653190413] [2024-09-25 10:27:04,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:04,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:27:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:27:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:27:04,484 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:04,566 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-09-25 10:27:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:27:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-25 10:27:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:04,568 INFO L225 Difference]: With dead ends: 59 [2024-09-25 10:27:04,568 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 10:27:04,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:27:04,569 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:04,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 10:27:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-09-25 10:27:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-09-25 10:27:04,588 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2024-09-25 10:27:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:04,588 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-09-25 10:27:04,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:04,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-09-25 10:27:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 10:27:04,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:04,590 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:04,607 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:04,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 10:27:04,791 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:04,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:04,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1911342567, now seen corresponding path program 5 times [2024-09-25 10:27:04,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:04,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846474089] [2024-09-25 10:27:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:04,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:04,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846474089] [2024-09-25 10:27:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846474089] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302295285] [2024-09-25 10:27:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:04,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:04,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:04,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:27:04,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-25 10:27:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:04,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:27:04,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:04,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302295285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:05,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-09-25 10:27:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022846215] [2024-09-25 10:27:05,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:05,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 10:27:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 10:27:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:27:05,007 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:05,178 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-25 10:27:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:27:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-25 10:27:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:05,180 INFO L225 Difference]: With dead ends: 88 [2024-09-25 10:27:05,180 INFO L226 Difference]: Without dead ends: 79 [2024-09-25 10:27:05,180 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:27:05,181 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:05,181 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-25 10:27:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-25 10:27:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-09-25 10:27:05,197 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 20 [2024-09-25 10:27:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:05,197 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-09-25 10:27:05,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-09-25 10:27:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 10:27:05,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:05,198 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:05,215 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 10:27:05,402 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:05,403 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1409703062, now seen corresponding path program 6 times [2024-09-25 10:27:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973177420] [2024-09-25 10:27:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973177420] [2024-09-25 10:27:05,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973177420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313783362] [2024-09-25 10:27:05,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:05,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:05,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:05,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:05,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:27:05,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-25 10:27:05,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:05,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:27:05,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:05,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:05,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313783362] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:05,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:05,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-25 10:27:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500218522] [2024-09-25 10:27:05,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:05,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:27:05,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:27:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:27:05,722 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:05,873 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2024-09-25 10:27:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:27:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-25 10:27:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:05,874 INFO L225 Difference]: With dead ends: 80 [2024-09-25 10:27:05,874 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 10:27:05,875 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:27:05,875 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:05,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 88 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 10:27:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-09-25 10:27:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-25 10:27:05,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 20 [2024-09-25 10:27:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:05,890 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-25 10:27:05,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-25 10:27:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-25 10:27:05,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:05,891 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:05,908 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:06,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:06,096 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:06,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -457266714, now seen corresponding path program 7 times [2024-09-25 10:27:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:06,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706544716] [2024-09-25 10:27:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:06,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:06,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706544716] [2024-09-25 10:27:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706544716] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408669944] [2024-09-25 10:27:06,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:06,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:06,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:06,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:27:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:27:06,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:06,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 10:27:06,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408669944] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:06,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:06,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-25 10:27:06,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196170281] [2024-09-25 10:27:06,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:06,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:27:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:27:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:27:06,350 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:06,473 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-09-25 10:27:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:27:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-25 10:27:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:06,474 INFO L225 Difference]: With dead ends: 61 [2024-09-25 10:27:06,475 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 10:27:06,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:27:06,476 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:06,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:06,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 10:27:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-25 10:27:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-09-25 10:27:06,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2024-09-25 10:27:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:06,493 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-09-25 10:27:06,493 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:06,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-09-25 10:27:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:27:06,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:06,494 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:06,511 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:06,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:27:06,695 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:06,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2034432077, now seen corresponding path program 8 times [2024-09-25 10:27:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:06,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817703415] [2024-09-25 10:27:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817703415] [2024-09-25 10:27:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817703415] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368834748] [2024-09-25 10:27:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:06,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:06,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:06,835 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:27:06,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:06,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:27:06,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:06,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368834748] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:07,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-25 10:27:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494682187] [2024-09-25 10:27:07,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:07,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:27:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:27:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:27:07,012 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:07,223 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-09-25 10:27:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:27:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-25 10:27:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:07,225 INFO L225 Difference]: With dead ends: 75 [2024-09-25 10:27:07,225 INFO L226 Difference]: Without dead ends: 65 [2024-09-25 10:27:07,225 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:27:07,226 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:07,226 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-25 10:27:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-09-25 10:27:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-25 10:27:07,240 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2024-09-25 10:27:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:07,241 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-25 10:27:07,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-25 10:27:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 10:27:07,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:07,244 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:07,260 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:27:07,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:27:07,445 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:07,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,445 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 9 times [2024-09-25 10:27:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429649321] [2024-09-25 10:27:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:07,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429649321] [2024-09-25 10:27:07,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429649321] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469747847] [2024-09-25 10:27:07,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:07,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:07,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:07,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:27:07,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:27:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:07,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:27:07,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:07,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469747847] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:07,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:07,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-25 10:27:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506683851] [2024-09-25 10:27:07,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:07,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 10:27:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 10:27:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:27:07,811 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:07,895 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-25 10:27:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 10:27:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-25 10:27:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:07,897 INFO L225 Difference]: With dead ends: 87 [2024-09-25 10:27:07,897 INFO L226 Difference]: Without dead ends: 78 [2024-09-25 10:27:07,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:27:07,899 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:07,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-25 10:27:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2024-09-25 10:27:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-25 10:27:07,917 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 22 [2024-09-25 10:27:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:07,918 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-25 10:27:07,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-25 10:27:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-25 10:27:07,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:07,920 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:07,936 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:27:08,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 10:27:08,125 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 571398099, now seen corresponding path program 10 times [2024-09-25 10:27:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701661694] [2024-09-25 10:27:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:08,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:08,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:08,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701661694] [2024-09-25 10:27:08,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701661694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:08,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617541933] [2024-09-25 10:27:08,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:08,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:08,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:08,247 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:08,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:27:08,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:08,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 10:27:08,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:08,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617541933] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:08,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:08,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-25 10:27:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608000357] [2024-09-25 10:27:08,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:08,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:27:08,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:27:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:27:08,511 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:09,405 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2024-09-25 10:27:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-25 10:27:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-25 10:27:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:09,406 INFO L225 Difference]: With dead ends: 96 [2024-09-25 10:27:09,406 INFO L226 Difference]: Without dead ends: 74 [2024-09-25 10:27:09,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:27:09,408 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:09,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-25 10:27:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-25 10:27:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-25 10:27:09,429 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 23 [2024-09-25 10:27:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:09,429 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-25 10:27:09,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-25 10:27:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 10:27:09,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:09,430 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:09,446 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 10:27:09,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 10:27:09,635 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:09,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 11 times [2024-09-25 10:27:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313209456] [2024-09-25 10:27:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:09,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:09,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313209456] [2024-09-25 10:27:09,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313209456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217499334] [2024-09-25 10:27:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:09,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:09,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:09,811 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:09,812 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:27:09,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-25 10:27:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:09,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:27:09,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:09,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217499334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:10,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:10,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-25 10:27:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592948280] [2024-09-25 10:27:10,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:10,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:27:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:27:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:27:10,024 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:10,121 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-09-25 10:27:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:27:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-25 10:27:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:10,122 INFO L225 Difference]: With dead ends: 87 [2024-09-25 10:27:10,123 INFO L226 Difference]: Without dead ends: 77 [2024-09-25 10:27:10,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:27:10,124 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:10,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-25 10:27:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-09-25 10:27:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-25 10:27:10,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 25 [2024-09-25 10:27:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:10,146 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-25 10:27:10,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:10,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-25 10:27:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 10:27:10,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:10,147 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:10,164 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:10,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-25 10:27:10,348 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:10,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash -874703007, now seen corresponding path program 12 times [2024-09-25 10:27:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812237661] [2024-09-25 10:27:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:10,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812237661] [2024-09-25 10:27:10,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812237661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714313215] [2024-09-25 10:27:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:10,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:10,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:27:10,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-25 10:27:10,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:10,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:27:10,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:10,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:27:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714313215] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:10,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-09-25 10:27:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831904168] [2024-09-25 10:27:10,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:10,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:27:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:27:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:27:10,707 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:11,133 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-09-25 10:27:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 10:27:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-25 10:27:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:11,134 INFO L225 Difference]: With dead ends: 89 [2024-09-25 10:27:11,134 INFO L226 Difference]: Without dead ends: 76 [2024-09-25 10:27:11,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:27:11,135 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:11,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-25 10:27:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-09-25 10:27:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-09-25 10:27:11,157 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 25 [2024-09-25 10:27:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:11,157 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-09-25 10:27:11,157 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:11,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-09-25 10:27:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-25 10:27:11,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:11,158 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:11,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 10:27:11,358 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 10:27:11,359 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1920087306, now seen corresponding path program 13 times [2024-09-25 10:27:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:11,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878927689] [2024-09-25 10:27:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878927689] [2024-09-25 10:27:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878927689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484420289] [2024-09-25 10:27:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:11,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:11,498 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:27:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 10:27:11,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:11,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:11,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484420289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:11,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:11,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-25 10:27:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920171400] [2024-09-25 10:27:11,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:11,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:27:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:27:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:27:11,813 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:13,222 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-09-25 10:27:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-25 10:27:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-25 10:27:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:13,223 INFO L225 Difference]: With dead ends: 134 [2024-09-25 10:27:13,223 INFO L226 Difference]: Without dead ends: 108 [2024-09-25 10:27:13,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 10:27:13,224 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:13,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 166 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-25 10:27:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2024-09-25 10:27:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-09-25 10:27:13,252 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 26 [2024-09-25 10:27:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:13,252 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-09-25 10:27:13,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:13,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-09-25 10:27:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 10:27:13,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:13,253 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:13,268 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:13,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:13,458 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:13,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 14 times [2024-09-25 10:27:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798443287] [2024-09-25 10:27:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:13,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798443287] [2024-09-25 10:27:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798443287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710922663] [2024-09-25 10:27:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:13,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:13,650 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:13,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:27:13,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:13,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:27:13,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:13,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:13,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710922663] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:13,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:13,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-25 10:27:13,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390455619] [2024-09-25 10:27:13,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:13,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 10:27:13,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:13,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 10:27:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:27:13,861 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:13,980 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2024-09-25 10:27:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:27:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-25 10:27:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:13,982 INFO L225 Difference]: With dead ends: 101 [2024-09-25 10:27:13,982 INFO L226 Difference]: Without dead ends: 90 [2024-09-25 10:27:13,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:27:13,982 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:13,983 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-25 10:27:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-09-25 10:27:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2024-09-25 10:27:14,013 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 28 [2024-09-25 10:27:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:14,014 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2024-09-25 10:27:14,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2024-09-25 10:27:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 10:27:14,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:14,018 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:14,036 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-25 10:27:14,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:14,219 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:14,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1371434858, now seen corresponding path program 15 times [2024-09-25 10:27:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903450134] [2024-09-25 10:27:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:14,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:14,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903450134] [2024-09-25 10:27:14,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903450134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631689526] [2024-09-25 10:27:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:14,404 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:14,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:27:14,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:27:14,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:14,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:27:14,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:14,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:14,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631689526] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:14,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-09-25 10:27:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862861800] [2024-09-25 10:27:14,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:14,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 10:27:14,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 10:27:14,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:27:14,734 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:15,591 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-09-25 10:27:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-25 10:27:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-25 10:27:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:15,594 INFO L225 Difference]: With dead ends: 127 [2024-09-25 10:27:15,594 INFO L226 Difference]: Without dead ends: 106 [2024-09-25 10:27:15,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:27:15,597 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:15,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:15,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-25 10:27:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-09-25 10:27:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-09-25 10:27:15,643 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2024-09-25 10:27:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:15,643 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-09-25 10:27:15,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:15,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-09-25 10:27:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 10:27:15,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:15,644 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:15,662 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 10:27:15,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:15,845 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:15,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -160836781, now seen corresponding path program 16 times [2024-09-25 10:27:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:15,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288581359] [2024-09-25 10:27:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:16,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:16,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:16,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288581359] [2024-09-25 10:27:16,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288581359] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083978866] [2024-09-25 10:27:16,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:16,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:16,065 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:27:16,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:16,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:16,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:16,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083978866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:16,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 29 [2024-09-25 10:27:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363575347] [2024-09-25 10:27:16,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:16,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 10:27:16,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 10:27:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:27:16,450 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:17,063 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-09-25 10:27:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-25 10:27:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-25 10:27:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:17,067 INFO L225 Difference]: With dead ends: 172 [2024-09-25 10:27:17,067 INFO L226 Difference]: Without dead ends: 161 [2024-09-25 10:27:17,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:27:17,069 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:17,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-25 10:27:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2024-09-25 10:27:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-25 10:27:17,107 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 29 [2024-09-25 10:27:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:17,107 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-25 10:27:17,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:17,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-25 10:27:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 10:27:17,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:17,109 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:17,125 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:17,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-25 10:27:17,310 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:17,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash -511416493, now seen corresponding path program 17 times [2024-09-25 10:27:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:17,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576909807] [2024-09-25 10:27:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:17,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 10:27:17,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576909807] [2024-09-25 10:27:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576909807] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895026771] [2024-09-25 10:27:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:17,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:17,508 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:17,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:27:17,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-25 10:27:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:17,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:17,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 10:27:17,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 10:27:17,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895026771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:17,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:17,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-09-25 10:27:17,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657536252] [2024-09-25 10:27:17,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:17,941 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 10:27:17,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 10:27:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:27:17,942 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:18,569 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2024-09-25 10:27:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-25 10:27:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-25 10:27:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:18,570 INFO L225 Difference]: With dead ends: 171 [2024-09-25 10:27:18,570 INFO L226 Difference]: Without dead ends: 150 [2024-09-25 10:27:18,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:27:18,571 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:18,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-25 10:27:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 94. [2024-09-25 10:27:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-09-25 10:27:18,599 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 31 [2024-09-25 10:27:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:18,600 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-09-25 10:27:18,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:18,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-09-25 10:27:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 10:27:18,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:18,601 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:18,614 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:18,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-25 10:27:18,801 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:18,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 18 times [2024-09-25 10:27:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:18,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711197777] [2024-09-25 10:27:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:19,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:19,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711197777] [2024-09-25 10:27:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711197777] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577901648] [2024-09-25 10:27:19,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:19,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:19,018 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:19,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:27:19,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-25 10:27:19,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:19,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:27:19,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:19,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:19,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577901648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:19,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:19,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-09-25 10:27:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169872130] [2024-09-25 10:27:19,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:19,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:27:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:27:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:27:19,271 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:19,409 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2024-09-25 10:27:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:27:19,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-25 10:27:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:19,410 INFO L225 Difference]: With dead ends: 149 [2024-09-25 10:27:19,410 INFO L226 Difference]: Without dead ends: 137 [2024-09-25 10:27:19,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:27:19,411 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:19,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-25 10:27:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2024-09-25 10:27:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-25 10:27:19,445 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 31 [2024-09-25 10:27:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:19,446 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-25 10:27:19,446 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:19,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-25 10:27:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:27:19,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:19,447 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:19,459 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 10:27:19,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-25 10:27:19,647 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1253123073, now seen corresponding path program 19 times [2024-09-25 10:27:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362781646] [2024-09-25 10:27:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:19,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:27:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362781646] [2024-09-25 10:27:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362781646] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144752264] [2024-09-25 10:27:19,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:19,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:19,858 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:19,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:27:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:19,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-25 10:27:19,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:19,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:20,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144752264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:20,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:20,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-25 10:27:20,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334222424] [2024-09-25 10:27:20,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:20,387 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 10:27:20,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 10:27:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:27:20,389 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:25,090 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-09-25 10:27:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-25 10:27:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-25 10:27:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:25,097 INFO L225 Difference]: With dead ends: 237 [2024-09-25 10:27:25,097 INFO L226 Difference]: Without dead ends: 194 [2024-09-25 10:27:25,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2042, Invalid=13708, Unknown=0, NotChecked=0, Total=15750 [2024-09-25 10:27:25,105 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 388 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:25,106 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 232 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:27:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-25 10:27:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2024-09-25 10:27:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 126 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2024-09-25 10:27:25,189 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 33 [2024-09-25 10:27:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:25,189 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2024-09-25 10:27:25,190 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2024-09-25 10:27:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:27:25,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:25,191 INFO L216 NwaCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:25,208 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:25,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-25 10:27:25,395 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:25,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1779115071, now seen corresponding path program 20 times [2024-09-25 10:27:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227543926] [2024-09-25 10:27:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:25,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:25,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227543926] [2024-09-25 10:27:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227543926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:25,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439944882] [2024-09-25 10:27:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:25,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:25,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:25,644 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:25,645 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:27:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:25,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 10:27:25,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:25,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-25 10:27:26,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439944882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:26,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:26,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-25 10:27:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252431336] [2024-09-25 10:27:26,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:26,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:27:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:27:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:27:26,104 INFO L87 Difference]: Start difference. First operand 131 states and 160 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:27,198 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-09-25 10:27:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-25 10:27:27,198 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-25 10:27:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:27,199 INFO L225 Difference]: With dead ends: 156 [2024-09-25 10:27:27,199 INFO L226 Difference]: Without dead ends: 139 [2024-09-25 10:27:27,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:27:27,201 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:27,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 301 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-25 10:27:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2024-09-25 10:27:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2024-09-25 10:27:27,256 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 33 [2024-09-25 10:27:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:27,256 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2024-09-25 10:27:27,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:27,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2024-09-25 10:27:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:27:27,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:27,257 INFO L216 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:27,272 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:27,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 10:27:27,458 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:27,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1898873598, now seen corresponding path program 21 times [2024-09-25 10:27:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:27,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568905333] [2024-09-25 10:27:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:27,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568905333] [2024-09-25 10:27:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568905333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837218945] [2024-09-25 10:27:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:27,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:27,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:27,725 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:27,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:27:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:27:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:27,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:27:27,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:27:27,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:27:28,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837218945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:28,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:28,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 35 [2024-09-25 10:27:28,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659575714] [2024-09-25 10:27:28,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:28,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:27:28,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:28,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:27:28,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:27:28,227 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:29,851 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-25 10:27:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-09-25 10:27:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-25 10:27:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:29,853 INFO L225 Difference]: With dead ends: 174 [2024-09-25 10:27:29,853 INFO L226 Difference]: Without dead ends: 162 [2024-09-25 10:27:29,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1288, Invalid=6194, Unknown=0, NotChecked=0, Total=7482 [2024-09-25 10:27:29,856 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:29,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 10:27:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-25 10:27:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2024-09-25 10:27:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-09-25 10:27:29,917 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 33 [2024-09-25 10:27:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:29,917 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-09-25 10:27:29,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:29,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-09-25 10:27:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 10:27:29,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:29,918 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:29,932 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:30,118 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-25 10:27:30,119 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:30,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 22 times [2024-09-25 10:27:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:30,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608677504] [2024-09-25 10:27:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:30,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:27:30,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608677504] [2024-09-25 10:27:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608677504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770025066] [2024-09-25 10:27:30,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:30,394 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:30,395 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 10:27:30,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:30,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-25 10:27:30,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:27:30,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:27:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770025066] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2024-09-25 10:27:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78549604] [2024-09-25 10:27:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:30,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:27:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:27:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:27:30,605 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:30,755 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-09-25 10:27:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:27:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-25 10:27:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:30,756 INFO L225 Difference]: With dead ends: 157 [2024-09-25 10:27:30,757 INFO L226 Difference]: Without dead ends: 144 [2024-09-25 10:27:30,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:27:30,757 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:30,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-25 10:27:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2024-09-25 10:27:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-09-25 10:27:30,833 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 34 [2024-09-25 10:27:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:30,833 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-09-25 10:27:30,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:30,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-09-25 10:27:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 10:27:30,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:30,834 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:30,846 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-25 10:27:31,034 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-25 10:27:31,035 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:31,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1701774746, now seen corresponding path program 23 times [2024-09-25 10:27:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132853838] [2024-09-25 10:27:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:31,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 10:27:31,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:31,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132853838] [2024-09-25 10:27:31,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132853838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:31,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676604254] [2024-09-25 10:27:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:31,292 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:31,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 10:27:31,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 10:27:31,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:31,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-25 10:27:31,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 10:27:31,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 10:27:31,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676604254] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:31,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:31,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-25 10:27:31,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227945334] [2024-09-25 10:27:31,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:31,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 10:27:31,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 10:27:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:27:31,973 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:33,365 INFO L93 Difference]: Finished difference Result 263 states and 301 transitions. [2024-09-25 10:27:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-25 10:27:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-25 10:27:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:33,367 INFO L225 Difference]: With dead ends: 263 [2024-09-25 10:27:33,367 INFO L226 Difference]: Without dead ends: 239 [2024-09-25 10:27:33,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=3855, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:27:33,371 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:33,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-25 10:27:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 131. [2024-09-25 10:27:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-25 10:27:33,437 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2024-09-25 10:27:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:33,438 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-25 10:27:33,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-25 10:27:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 10:27:33,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:33,439 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:33,451 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:33,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-25 10:27:33,640 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:33,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738881, now seen corresponding path program 24 times [2024-09-25 10:27:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:33,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877195354] [2024-09-25 10:27:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:33,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877195354] [2024-09-25 10:27:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877195354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619211067] [2024-09-25 10:27:33,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:33,915 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:33,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 10:27:34,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-25 10:27:34,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:34,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:34,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:34,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:34,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619211067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:34,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:34,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-25 10:27:34,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503833520] [2024-09-25 10:27:34,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:34,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:27:34,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:27:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:27:34,292 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:34,551 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2024-09-25 10:27:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:27:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-25 10:27:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:34,552 INFO L225 Difference]: With dead ends: 206 [2024-09-25 10:27:34,552 INFO L226 Difference]: Without dead ends: 192 [2024-09-25 10:27:34,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:27:34,553 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:34,553 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-25 10:27:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2024-09-25 10:27:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 143 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-09-25 10:27:34,629 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 37 [2024-09-25 10:27:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:34,630 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-09-25 10:27:34,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:34,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-09-25 10:27:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-25 10:27:34,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:34,631 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:34,645 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:34,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:34,835 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:34,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash -939864138, now seen corresponding path program 25 times [2024-09-25 10:27:34,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178217345] [2024-09-25 10:27:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:35,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178217345] [2024-09-25 10:27:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178217345] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192251177] [2024-09-25 10:27:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:35,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:35,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:35,122 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:35,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-25 10:27:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:35,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 10:27:35,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:35,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:27:35,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192251177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:35,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:35,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-25 10:27:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490403275] [2024-09-25 10:27:35,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:35,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 10:27:35,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 10:27:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:27:35,689 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:47,652 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-09-25 10:27:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-09-25 10:27:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-25 10:27:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:47,653 INFO L225 Difference]: With dead ends: 312 [2024-09-25 10:27:47,653 INFO L226 Difference]: Without dead ends: 260 [2024-09-25 10:27:47,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2024-09-25 10:27:47,656 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 692 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:47,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 224 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:27:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-25 10:27:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2024-09-25 10:27:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 154 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2024-09-25 10:27:47,742 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 38 [2024-09-25 10:27:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:47,742 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2024-09-25 10:27:47,742 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:47,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2024-09-25 10:27:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-25 10:27:47,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:47,743 INFO L216 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:47,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-25 10:27:47,944 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:47,944 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:47,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -981807486, now seen corresponding path program 26 times [2024-09-25 10:27:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046805288] [2024-09-25 10:27:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:48,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:48,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046805288] [2024-09-25 10:27:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046805288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179625211] [2024-09-25 10:27:48,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:48,341 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:48,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-25 10:27:48,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:48,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-25 10:27:48,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:48,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 10:27:48,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179625211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:48,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 42 [2024-09-25 10:27:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224557474] [2024-09-25 10:27:48,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:48,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 10:27:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 10:27:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:27:48,866 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:51,557 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2024-09-25 10:27:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-09-25 10:27:51,557 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-25 10:27:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:51,559 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:27:51,559 INFO L226 Difference]: Without dead ends: 222 [2024-09-25 10:27:51,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=867, Invalid=8835, Unknown=0, NotChecked=0, Total=9702 [2024-09-25 10:27:51,560 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:51,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 484 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:27:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-25 10:27:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-09-25 10:27:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2024-09-25 10:27:51,671 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 39 [2024-09-25 10:27:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:51,671 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2024-09-25 10:27:51,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:51,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2024-09-25 10:27:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:27:51,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:51,673 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:51,685 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:51,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:51,873 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:51,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash -316344474, now seen corresponding path program 27 times [2024-09-25 10:27:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:51,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661048042] [2024-09-25 10:27:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:51,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:52,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:52,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661048042] [2024-09-25 10:27:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661048042] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274863050] [2024-09-25 10:27:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:52,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:52,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:52,208 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:52,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-25 10:27:52,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:27:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:52,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 10:27:52,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:52,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274863050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:52,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-09-25 10:27:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184745312] [2024-09-25 10:27:52,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:52,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:27:52,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:27:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:27:52,579 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:52,832 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2024-09-25 10:27:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:27:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-25 10:27:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:52,833 INFO L225 Difference]: With dead ends: 225 [2024-09-25 10:27:52,833 INFO L226 Difference]: Without dead ends: 210 [2024-09-25 10:27:52,834 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:27:52,834 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:52,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-09-25 10:27:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2024-09-25 10:27:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.1631578947368422) internal successors, (221), 190 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-09-25 10:27:52,954 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 40 [2024-09-25 10:27:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:52,954 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-09-25 10:27:52,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:52,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-09-25 10:27:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-25 10:27:52,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:52,955 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:52,968 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-25 10:27:53,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-25 10:27:53,156 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:53,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash -325611725, now seen corresponding path program 28 times [2024-09-25 10:27:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:53,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41946478] [2024-09-25 10:27:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:53,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:53,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41946478] [2024-09-25 10:27:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41946478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795171842] [2024-09-25 10:27:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:53,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:53,494 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:53,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-25 10:27:53,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:53,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-25 10:27:53,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:53,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:27:54,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795171842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:54,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:54,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-25 10:27:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732048640] [2024-09-25 10:27:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:54,111 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 10:27:54,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 10:27:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:27:54,112 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:13,143 INFO L93 Difference]: Finished difference Result 404 states and 469 transitions. [2024-09-25 10:28:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-09-25 10:28:13,143 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-25 10:28:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:13,144 INFO L225 Difference]: With dead ends: 404 [2024-09-25 10:28:13,144 INFO L226 Difference]: Without dead ends: 349 [2024-09-25 10:28:13,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14929 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2024-09-25 10:28:13,148 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 852 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:13,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 286 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:28:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-25 10:28:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2024-09-25 10:28:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1764705882352942) internal successors, (240), 204 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-09-25 10:28:13,347 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 41 [2024-09-25 10:28:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:13,347 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-09-25 10:28:13,347 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:13,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-09-25 10:28:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 10:28:13,348 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:13,348 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:13,362 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:13,549 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-25 10:28:13,549 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:13,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1065646369, now seen corresponding path program 29 times [2024-09-25 10:28:13,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:13,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753087110] [2024-09-25 10:28:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:13,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:13,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:13,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753087110] [2024-09-25 10:28:13,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753087110] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388683268] [2024-09-25 10:28:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:28:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:13,880 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:13,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-25 10:28:14,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 10:28:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:14,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 10:28:14,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:14,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:14,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388683268] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:14,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:14,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2024-09-25 10:28:14,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304188807] [2024-09-25 10:28:14,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:14,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:28:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:28:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:28:14,265 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:14,641 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-09-25 10:28:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:28:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-25 10:28:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:14,644 INFO L225 Difference]: With dead ends: 251 [2024-09-25 10:28:14,644 INFO L226 Difference]: Without dead ends: 235 [2024-09-25 10:28:14,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:28:14,644 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:14,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 307 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:28:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-25 10:28:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2024-09-25 10:28:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 215 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2024-09-25 10:28:14,862 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 43 [2024-09-25 10:28:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:14,862 INFO L474 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2024-09-25 10:28:14,863 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:14,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2024-09-25 10:28:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 10:28:14,864 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:14,864 INFO L216 NwaCegarLoop]: trace histogram [16, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:14,880 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:15,064 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-25 10:28:15,065 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:15,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash -133663071, now seen corresponding path program 30 times [2024-09-25 10:28:15,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771405060] [2024-09-25 10:28:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:15,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:15,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:28:15,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771405060] [2024-09-25 10:28:15,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771405060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042865353] [2024-09-25 10:28:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:28:15,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:15,475 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:15,476 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-25 10:28:15,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-25 10:28:15,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:15,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-25 10:28:15,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:28:15,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-25 10:28:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042865353] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:16,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:16,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 16] total 47 [2024-09-25 10:28:16,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59150446] [2024-09-25 10:28:16,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:16,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:28:16,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:28:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:28:16,246 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:20,036 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-09-25 10:28:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-25 10:28:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-25 10:28:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:20,037 INFO L225 Difference]: With dead ends: 284 [2024-09-25 10:28:20,037 INFO L226 Difference]: Without dead ends: 240 [2024-09-25 10:28:20,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1183, Invalid=12389, Unknown=0, NotChecked=0, Total=13572 [2024-09-25 10:28:20,038 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:20,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 556 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 10:28:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-25 10:28:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-09-25 10:28:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1598173515981736) internal successors, (254), 219 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2024-09-25 10:28:20,193 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 43 [2024-09-25 10:28:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:20,193 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2024-09-25 10:28:20,193 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:20,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2024-09-25 10:28:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 10:28:20,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:20,194 INFO L216 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:20,206 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-25 10:28:20,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-25 10:28:20,394 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:20,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1260222622, now seen corresponding path program 31 times [2024-09-25 10:28:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477645712] [2024-09-25 10:28:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:20,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:28:20,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477645712] [2024-09-25 10:28:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477645712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867565275] [2024-09-25 10:28:20,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:28:20,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:20,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:20,819 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:20,820 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-25 10:28:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:20,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-25 10:28:20,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:21,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-25 10:28:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867565275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:21,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2024-09-25 10:28:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805000723] [2024-09-25 10:28:21,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:21,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:28:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:28:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:28:21,475 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:23,574 INFO L93 Difference]: Finished difference Result 409 states and 484 transitions. [2024-09-25 10:28:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-09-25 10:28:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-25 10:28:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:23,576 INFO L225 Difference]: With dead ends: 409 [2024-09-25 10:28:23,576 INFO L226 Difference]: Without dead ends: 395 [2024-09-25 10:28:23,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2024-09-25 10:28:23,578 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 309 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:23,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 542 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:28:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-25 10:28:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 223. [2024-09-25 10:28:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.146788990825688) internal successors, (250), 218 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2024-09-25 10:28:23,788 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 43 [2024-09-25 10:28:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:23,788 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2024-09-25 10:28:23,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:23,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2024-09-25 10:28:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 10:28:23,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:23,789 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:23,806 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:23,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-25 10:28:23,990 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:23,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash -535534058, now seen corresponding path program 32 times [2024-09-25 10:28:23,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:23,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731288639] [2024-09-25 10:28:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:24,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:24,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731288639] [2024-09-25 10:28:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731288639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800410511] [2024-09-25 10:28:24,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:28:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:24,355 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:24,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-25 10:28:24,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:28:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:24,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 10:28:24,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:24,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:28:25,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800410511] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:25,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:25,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-25 10:28:25,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277894334] [2024-09-25 10:28:25,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:25,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:28:25,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:25,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:28:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:28:25,073 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:55,167 INFO L93 Difference]: Finished difference Result 463 states and 527 transitions. [2024-09-25 10:28:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-09-25 10:28:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-25 10:28:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:55,170 INFO L225 Difference]: With dead ends: 463 [2024-09-25 10:28:55,170 INFO L226 Difference]: Without dead ends: 399 [2024-09-25 10:28:55,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21643 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=9078, Invalid=50214, Unknown=0, NotChecked=0, Total=59292 [2024-09-25 10:28:55,174 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1046 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:55,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 299 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 10:28:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-09-25 10:28:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 238. [2024-09-25 10:28:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1587982832618027) internal successors, (270), 233 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2024-09-25 10:28:55,416 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 44 [2024-09-25 10:28:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:55,416 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2024-09-25 10:28:55,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:55,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2024-09-25 10:28:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:28:55,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:55,417 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:55,434 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:55,618 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-25 10:28:55,618 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:55,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1831492090, now seen corresponding path program 33 times [2024-09-25 10:28:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664024131] [2024-09-25 10:28:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:55,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:28:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664024131] [2024-09-25 10:28:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664024131] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114820786] [2024-09-25 10:28:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:28:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:55,974 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:55,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-25 10:28:56,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-25 10:28:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:56,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-25 10:28:56,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:28:56,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:28:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114820786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:56,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2024-09-25 10:28:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017885354] [2024-09-25 10:28:56,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:56,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:28:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:28:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:28:56,350 INFO L87 Difference]: Start difference. First operand 238 states and 274 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:56,701 INFO L93 Difference]: Finished difference Result 280 states and 321 transitions. [2024-09-25 10:28:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:28:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-25 10:28:56,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:56,703 INFO L225 Difference]: With dead ends: 280 [2024-09-25 10:28:56,703 INFO L226 Difference]: Without dead ends: 263 [2024-09-25 10:28:56,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 26 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:28:56,703 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:56,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:28:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-25 10:28:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2024-09-25 10:28:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 244 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2024-09-25 10:28:56,882 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 46 [2024-09-25 10:28:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:56,882 INFO L474 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2024-09-25 10:28:56,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:56,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2024-09-25 10:28:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:28:56,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:56,884 INFO L216 NwaCegarLoop]: trace histogram [18, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-25 10:28:57,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-25 10:28:57,084 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:57,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1201296938, now seen corresponding path program 34 times [2024-09-25 10:28:57,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:57,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280983489] [2024-09-25 10:28:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:57,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:57,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:28:57,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280983489] [2024-09-25 10:28:57,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280983489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878513895] [2024-09-25 10:28:57,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:28:57,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:57,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:57,518 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:57,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-25 10:28:57,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:28:57,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:57,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-25 10:28:57,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:28:57,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-25 10:28:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878513895] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:58,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:58,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 53 [2024-09-25 10:28:58,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733994335] [2024-09-25 10:28:58,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:58,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 10:28:58,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:58,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 10:28:58,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:28:58,299 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:04,016 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2024-09-25 10:29:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-25 10:29:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-25 10:29:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:04,018 INFO L225 Difference]: With dead ends: 319 [2024-09-25 10:29:04,018 INFO L226 Difference]: Without dead ends: 279 [2024-09-25 10:29:04,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1655, Invalid=19225, Unknown=0, NotChecked=0, Total=20880 [2024-09-25 10:29:04,023 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:04,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 618 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:29:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-09-25 10:29:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2024-09-25 10:29:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.13671875) internal successors, (291), 256 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2024-09-25 10:29:04,203 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 46 [2024-09-25 10:29:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:04,203 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2024-09-25 10:29:04,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:04,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2024-09-25 10:29:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 10:29:04,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:04,205 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:04,218 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-25 10:29:04,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-25 10:29:04,409 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:04,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 981523539, now seen corresponding path program 35 times [2024-09-25 10:29:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685993496] [2024-09-25 10:29:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:04,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:29:04,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:04,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685993496] [2024-09-25 10:29:04,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685993496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:04,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114387759] [2024-09-25 10:29:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:29:04,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:04,827 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:04,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-25 10:29:05,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 10:29:05,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:29:05,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-25 10:29:05,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:29:05,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:29:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 10:29:06,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114387759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:29:06,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:29:06,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-09-25 10:29:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123785409] [2024-09-25 10:29:06,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:29:06,348 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-25 10:29:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:29:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-25 10:29:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:29:06,349 INFO L87 Difference]: Start difference. First operand 261 states and 295 transitions. Second operand has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:11,849 INFO L93 Difference]: Finished difference Result 549 states and 622 transitions. [2024-09-25 10:29:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-09-25 10:29:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-09-25 10:29:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:11,851 INFO L225 Difference]: With dead ends: 549 [2024-09-25 10:29:11,851 INFO L226 Difference]: Without dead ends: 518 [2024-09-25 10:29:11,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3228, Invalid=13028, Unknown=0, NotChecked=0, Total=16256 [2024-09-25 10:29:11,853 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 368 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:11,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 353 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:29:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-09-25 10:29:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 296. [2024-09-25 10:29:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.1443298969072164) internal successors, (333), 291 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2024-09-25 10:29:12,084 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 47 [2024-09-25 10:29:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:12,084 INFO L474 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2024-09-25 10:29:12,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:12,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2024-09-25 10:29:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 10:29:12,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:12,085 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:12,101 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-25 10:29:12,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:12,286 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:12,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1882278143, now seen corresponding path program 36 times [2024-09-25 10:29:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921011475] [2024-09-25 10:29:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:12,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:12,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921011475] [2024-09-25 10:29:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921011475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602953076] [2024-09-25 10:29:12,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:29:12,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:12,730 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:12,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-25 10:29:12,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 10:29:12,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:29:12,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-25 10:29:12,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:13,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:29:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602953076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:29:13,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:29:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-25 10:29:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030089986] [2024-09-25 10:29:13,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:29:13,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 10:29:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:29:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 10:29:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:29:13,342 INFO L87 Difference]: Start difference. First operand 296 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:14,067 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2024-09-25 10:29:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:29:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2024-09-25 10:29:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:14,070 INFO L225 Difference]: With dead ends: 469 [2024-09-25 10:29:14,070 INFO L226 Difference]: Without dead ends: 451 [2024-09-25 10:29:14,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 28 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:29:14,071 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:14,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 353 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:29:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-09-25 10:29:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 332. [2024-09-25 10:29:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.1590214067278288) internal successors, (379), 327 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2024-09-25 10:29:14,358 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 49 [2024-09-25 10:29:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:14,358 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2024-09-25 10:29:14,358 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:29:14,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2024-09-25 10:29:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-25 10:29:14,360 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:14,360 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:14,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-25 10:29:14,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:14,565 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:14,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash 202552438, now seen corresponding path program 37 times [2024-09-25 10:29:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:14,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100890009] [2024-09-25 10:29:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100890009] [2024-09-25 10:29:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100890009] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462560378] [2024-09-25 10:29:15,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:29:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:15,055 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:15,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-25 10:29:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 10:29:15,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:15,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:29:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 10:29:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462560378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:29:16,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:29:16,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-25 10:29:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006130603] [2024-09-25 10:29:16,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:29:16,031 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:29:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:29:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:29:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:29:16,033 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:30:25,051 INFO L93 Difference]: Finished difference Result 693 states and 810 transitions. [2024-09-25 10:30:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2024-09-25 10:30:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-25 10:30:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:30:25,053 INFO L225 Difference]: With dead ends: 693 [2024-09-25 10:30:25,053 INFO L226 Difference]: Without dead ends: 586 [2024-09-25 10:30:25,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41658 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=16448, Invalid=90154, Unknown=0, NotChecked=0, Total=106602 [2024-09-25 10:30:25,058 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1728 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:30:25,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 335 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-25 10:30:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-25 10:30:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2024-09-25 10:30:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.158682634730539) internal successors, (387), 334 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 391 transitions. [2024-09-25 10:30:25,378 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 391 transitions. Word has length 50 [2024-09-25 10:30:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:30:25,378 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 391 transitions. [2024-09-25 10:30:25,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:25,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 391 transitions. [2024-09-25 10:30:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 10:30:25,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:30:25,379 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:30:25,392 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-25 10:30:25,579 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:25,580 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:30:25,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash -436609882, now seen corresponding path program 38 times [2024-09-25 10:30:25,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:30:25,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505131478] [2024-09-25 10:30:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:30:25,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:30:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:26,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:30:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 10:30:26,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:30:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505131478] [2024-09-25 10:30:26,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505131478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:30:26,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557976763] [2024-09-25 10:30:26,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:30:26,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:30:26,051 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:30:26,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-25 10:30:26,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:30:26,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:30:26,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-25 10:30:26,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:30:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 10:30:26,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:30:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 10:30:26,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557976763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:30:26,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:30:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2024-09-25 10:30:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208634992] [2024-09-25 10:30:26,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:30:26,575 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:30:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:30:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:30:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:30:26,575 INFO L87 Difference]: Start difference. First operand 339 states and 391 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:30:27,203 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2024-09-25 10:30:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 10:30:27,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-09-25 10:30:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:30:27,205 INFO L225 Difference]: With dead ends: 424 [2024-09-25 10:30:27,205 INFO L226 Difference]: Without dead ends: 405 [2024-09-25 10:30:27,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 30 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:30:27,206 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:30:27,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 399 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:30:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-25 10:30:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2024-09-25 10:30:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.1618497109826589) internal successors, (402), 346 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-09-25 10:30:27,536 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 52 [2024-09-25 10:30:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:30:27,537 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-09-25 10:30:27,537 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:27,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-09-25 10:30:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-25 10:30:27,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:30:27,538 INFO L216 NwaCegarLoop]: trace histogram [22, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:30:27,555 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-25 10:30:27,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-25 10:30:27,743 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:30:27,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -428518713, now seen corresponding path program 39 times [2024-09-25 10:30:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:30:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823509102] [2024-09-25 10:30:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:30:27,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:30:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:28,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:30:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:30:28,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:30:28,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823509102] [2024-09-25 10:30:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823509102] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:30:28,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812689054] [2024-09-25 10:30:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:30:28,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:28,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:30:28,376 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:30:28,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-25 10:30:28,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:30:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:30:28,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:30:28,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:30:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-25 10:30:29,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:30:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-25 10:30:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812689054] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:30:29,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:30:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 20] total 61 [2024-09-25 10:30:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102457162] [2024-09-25 10:30:29,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:30:29,751 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-25 10:30:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:30:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-25 10:30:29,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:30:29,752 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:30:42,783 INFO L93 Difference]: Finished difference Result 501 states and 611 transitions. [2024-09-25 10:30:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2024-09-25 10:30:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-09-25 10:30:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:30:42,786 INFO L225 Difference]: With dead ends: 501 [2024-09-25 10:30:42,786 INFO L226 Difference]: Without dead ends: 425 [2024-09-25 10:30:42,788 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16165 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3240, Invalid=54120, Unknown=0, NotChecked=0, Total=57360 [2024-09-25 10:30:42,789 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 7011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 6824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:30:42,789 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 854 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 6824 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-25 10:30:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-09-25 10:30:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 370. [2024-09-25 10:30:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1424657534246576) internal successors, (417), 365 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 421 transitions. [2024-09-25 10:30:43,125 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 421 transitions. Word has length 52 [2024-09-25 10:30:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:30:43,125 INFO L474 AbstractCegarLoop]: Abstraction has 370 states and 421 transitions. [2024-09-25 10:30:43,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:43,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 421 transitions. [2024-09-25 10:30:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 10:30:43,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:30:43,127 INFO L216 NwaCegarLoop]: trace histogram [23, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:30:43,144 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-25 10:30:43,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:43,327 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:30:43,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1732839874, now seen corresponding path program 40 times [2024-09-25 10:30:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:30:43,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80820783] [2024-09-25 10:30:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:30:43,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:30:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:43,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:30:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:30:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:30:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80820783] [2024-09-25 10:30:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80820783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:30:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102608412] [2024-09-25 10:30:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:30:43,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:30:43,924 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:30:43,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-25 10:30:43,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:30:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:30:43,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-25 10:30:43,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:30:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:30:44,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:30:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-25 10:30:44,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102608412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:30:44,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:30:44,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 20] total 63 [2024-09-25 10:30:44,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918081231] [2024-09-25 10:30:44,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:30:44,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-25 10:30:44,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:30:44,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-25 10:30:44,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:30:44,905 INFO L87 Difference]: Start difference. First operand 370 states and 421 transitions. Second operand has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:30:49,342 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2024-09-25 10:30:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-09-25 10:30:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2024-09-25 10:30:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:30:49,345 INFO L225 Difference]: With dead ends: 720 [2024-09-25 10:30:49,345 INFO L226 Difference]: Without dead ends: 702 [2024-09-25 10:30:49,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5119, Invalid=15761, Unknown=0, NotChecked=0, Total=20880 [2024-09-25 10:30:49,347 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:30:49,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 787 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:30:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-09-25 10:30:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 376. [2024-09-25 10:30:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.1320754716981132) internal successors, (420), 371 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 424 transitions. [2024-09-25 10:30:49,787 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 424 transitions. Word has length 53 [2024-09-25 10:30:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:30:49,787 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 424 transitions. [2024-09-25 10:30:49,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:49,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 424 transitions. [2024-09-25 10:30:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 10:30:49,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:30:49,788 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:30:49,800 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-25 10:30:49,988 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:49,989 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:30:49,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1452158177, now seen corresponding path program 41 times [2024-09-25 10:30:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:30:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129950563] [2024-09-25 10:30:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:30:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:30:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:50,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:30:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 10:30:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:30:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129950563] [2024-09-25 10:30:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129950563] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:30:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963450376] [2024-09-25 10:30:50,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:30:50,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:30:50,382 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:30:50,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-25 10:30:51,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-25 10:30:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:30:51,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-25 10:30:51,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:30:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 10:30:51,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:30:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 10:30:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963450376] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:30:51,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:30:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2024-09-25 10:30:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391920475] [2024-09-25 10:30:51,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:30:51,473 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:30:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:30:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:30:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:30:51,473 INFO L87 Difference]: Start difference. First operand 376 states and 424 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:30:52,211 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2024-09-25 10:30:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:30:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-25 10:30:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:30:52,214 INFO L225 Difference]: With dead ends: 459 [2024-09-25 10:30:52,214 INFO L226 Difference]: Without dead ends: 439 [2024-09-25 10:30:52,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 32 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:30:52,215 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:30:52,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 470 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:30:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-25 10:30:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 388. [2024-09-25 10:30:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.133159268929504) internal successors, (434), 383 states have internal predecessors, (434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2024-09-25 10:30:52,567 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 55 [2024-09-25 10:30:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:30:52,567 INFO L474 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2024-09-25 10:30:52,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:30:52,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2024-09-25 10:30:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:30:52,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:30:52,569 INFO L216 NwaCegarLoop]: trace histogram [24, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:30:52,584 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-25 10:30:52,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-25 10:30:52,769 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:30:52,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:30:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1240281910, now seen corresponding path program 42 times [2024-09-25 10:30:52,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:30:52,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402556797] [2024-09-25 10:30:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:30:52,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:30:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:53,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:30:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:30:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:30:53,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:30:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402556797] [2024-09-25 10:30:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402556797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:30:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520063313] [2024-09-25 10:30:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:30:53,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:30:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:30:53,465 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:30:53,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-25 10:30:53,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-25 10:30:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:30:53,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 10:30:53,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:30:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-25 10:30:54,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:30:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-25 10:30:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520063313] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:30:55,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:30:55,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 67 [2024-09-25 10:30:55,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261359798] [2024-09-25 10:30:55,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:30:55,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-25 10:30:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:30:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-25 10:30:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 10:30:55,275 INFO L87 Difference]: Start difference. First operand 388 states and 438 transitions. Second operand has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:14,429 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2024-09-25 10:31:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-25 10:31:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-25 10:31:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:14,431 INFO L225 Difference]: With dead ends: 522 [2024-09-25 10:31:14,431 INFO L226 Difference]: Without dead ends: 438 [2024-09-25 10:31:14,435 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28731 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=4553, Invalid=88777, Unknown=0, NotChecked=0, Total=93330 [2024-09-25 10:31:14,435 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 9145 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 9346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:14,436 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1085 Invalid, 9346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9145 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-25 10:31:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-25 10:31:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2024-09-25 10:31:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.117359413202934) internal successors, (457), 409 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 461 transitions. [2024-09-25 10:31:14,813 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 461 transitions. Word has length 56 [2024-09-25 10:31:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:14,813 INFO L474 AbstractCegarLoop]: Abstraction has 414 states and 461 transitions. [2024-09-25 10:31:14,813 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:14,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 461 transitions. [2024-09-25 10:31:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-25 10:31:14,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:14,814 INFO L216 NwaCegarLoop]: trace histogram [25, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:14,828 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-25 10:31:15,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-25 10:31:15,015 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:15,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -824573133, now seen corresponding path program 43 times [2024-09-25 10:31:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:15,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159260001] [2024-09-25 10:31:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:15,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:31:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159260001] [2024-09-25 10:31:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159260001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970793191] [2024-09-25 10:31:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:31:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:15,722 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:31:15,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-25 10:31:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:15,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-25 10:31:15,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:31:16,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-25 10:31:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970793191] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:16,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:16,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 22] total 69 [2024-09-25 10:31:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894151739] [2024-09-25 10:31:16,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:16,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-25 10:31:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-25 10:31:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=3807, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:31:16,886 INFO L87 Difference]: Start difference. First operand 414 states and 461 transitions. Second operand has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)