./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de20.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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:07:59,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:08:00,041 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:08:00,048 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:08:00,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:08:00,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:08:00,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:08:00,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:08:00,076 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:08:00,076 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:08:00,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:08:00,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:08:00,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:08:00,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:08:00,078 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:08:00,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:08:00,079 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:08:00,079 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:08:00,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:08:00,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:08:00,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:08:00,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:08:00,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:08:00,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:08:00,085 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:08:00,085 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:08:00,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:08:00,086 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:08:00,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:08:00,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:08:00,086 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:08:00,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:08:00,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:00,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:08:00,087 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:08:00,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:08:00,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:08:00,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:08:00,088 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:08:00,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:08:00,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:08:00,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:08:00,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:08:00,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:08:00,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:08:00,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:08:00,406 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:08:00,406 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:08:00,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-24 23:08:01,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:08:02,019 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:08:02,019 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-24 23:08:02,028 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/81603eb8b/d6fbdc11b4124518a008fa318ac7652c/FLAG905108d29 [2024-09-24 23:08:02,047 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/81603eb8b/d6fbdc11b4124518a008fa318ac7652c [2024-09-24 23:08:02,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:08:02,053 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:08:02,054 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:02,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:08:02,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:08:02,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d983562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02, skipping insertion in model container [2024-09-24 23:08:02,062 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,080 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:08:02,234 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-de20.c[368,381] [2024-09-24 23:08:02,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:02,264 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:08:02,276 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-de20.c[368,381] [2024-09-24 23:08:02,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:02,298 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:08:02,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02 WrapperNode [2024-09-24 23:08:02,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:02,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:02,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:08:02,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:08:02,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,320 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:08:02,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:02,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:08:02,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:08:02,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:08:02,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,332 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,347 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 23:08:02,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:08:02,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:08:02,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:08:02,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:08:02,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (1/1) ... [2024-09-24 23:08:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:02,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:02,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 23:08:02,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 23:08:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:08:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:08:02,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:08:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:08:02,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:08:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:08:02,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:08:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:08:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:08:02,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:08:02,508 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:08:02,510 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:08:02,660 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:08:02,660 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:08:02,677 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:08:02,678 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:08:02,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:02 BoogieIcfgContainer [2024-09-24 23:08:02,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:08:02,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:08:02,684 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:08:02,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:08:02,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:08:02" (1/3) ... [2024-09-24 23:08:02,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7da598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:02, skipping insertion in model container [2024-09-24 23:08:02,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:02" (2/3) ... [2024-09-24 23:08:02,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7da598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:02, skipping insertion in model container [2024-09-24 23:08:02,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:02" (3/3) ... [2024-09-24 23:08:02,690 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de20.c [2024-09-24 23:08:02,705 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:08:02,705 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:08:02,761 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:08:02,769 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;@15bd06f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:08:02,769 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:08:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-09-24 23:08:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-24 23:08:02,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:02,781 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:02,782 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2046341363, now seen corresponding path program 1 times [2024-09-24 23:08:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:02,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141679958] [2024-09-24 23:08:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:02,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:02,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:02,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141679958] [2024-09-24 23:08:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141679958] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:08:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460070273] [2024-09-24 23:08:02,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:02,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:08:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:08:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:08:02,990 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-09-24 23:08:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:03,019 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-09-24 23:08:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:08:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2024-09-24 23:08:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:03,025 INFO L225 Difference]: With dead ends: 32 [2024-09-24 23:08:03,026 INFO L226 Difference]: Without dead ends: 13 [2024-09-24 23:08:03,028 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 [2024-09-24 23:08:03,030 INFO L434 NwaCegarLoop]: 18 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, 18 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 [2024-09-24 23:08:03,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-24 23:08:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-24 23:08:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2024-09-24 23:08:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-24 23:08:03,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2024-09-24 23:08:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:03,059 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-24 23:08:03,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-09-24 23:08:03,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-24 23:08:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-24 23:08:03,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:03,062 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:03,062 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:08:03,063 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:03,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1301388791, now seen corresponding path program 1 times [2024-09-24 23:08:03,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:03,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529122187] [2024-09-24 23:08:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:03,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529122187] [2024-09-24 23:08:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529122187] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:03,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:08:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292620827] [2024-09-24 23:08:03,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:03,436 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:08:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:08:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:03,437 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-24 23:08:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:03,486 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-24 23:08:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:08:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2024-09-24 23:08:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:03,488 INFO L225 Difference]: With dead ends: 21 [2024-09-24 23:08:03,488 INFO L226 Difference]: Without dead ends: 16 [2024-09-24 23:08:03,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:03,490 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:03,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-24 23:08:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-24 23:08:03,495 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) [2024-09-24 23:08:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-24 23:08:03,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2024-09-24 23:08:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:03,496 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-24 23:08:03,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-24 23:08:03,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-24 23:08:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-24 23:08:03,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:03,500 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:03,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:08:03,501 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:03,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1652809100, now seen corresponding path program 1 times [2024-09-24 23:08:03,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:03,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412188476] [2024-09-24 23:08:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412188476] [2024-09-24 23:08:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412188476] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:03,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:03,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:08:03,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039927839] [2024-09-24 23:08:03,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:03,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:03,580 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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) [2024-09-24 23:08:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:03,597 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-24 23:08:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 [2024-09-24 23:08:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:03,599 INFO L225 Difference]: With dead ends: 22 [2024-09-24 23:08:03,599 INFO L226 Difference]: Without dead ends: 14 [2024-09-24 23:08:03,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:03,600 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:03,601 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-24 23:08:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-24 23:08:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2024-09-24 23:08:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-24 23:08:03,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2024-09-24 23:08:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:03,605 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-24 23:08:03,606 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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) [2024-09-24 23:08:03,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-24 23:08:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-24 23:08:03,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:03,607 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:03,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:08:03,608 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:03,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 545094421, now seen corresponding path program 1 times [2024-09-24 23:08:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:03,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307453286] [2024-09-24 23:08:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307453286] [2024-09-24 23:08:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307453286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515074246] [2024-09-24 23:08:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:03,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:03,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:08:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:03,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:08:03,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:03,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:03,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515074246] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:03,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:03,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-24 23:08:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025319012] [2024-09-24 23:08:03,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:03,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:08:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:08:03,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:08:03,909 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2024-09-24 23:08:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:03,980 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-09-24 23:08:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:08:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 [2024-09-24 23:08:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:03,982 INFO L225 Difference]: With dead ends: 27 [2024-09-24 23:08:03,983 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:08:03,985 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:08:03,986 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:03,986 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:08:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-09-24 23:08:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2024-09-24 23:08:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-09-24 23:08:03,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-09-24 23:08:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:03,997 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-09-24 23:08:03,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2024-09-24 23:08:03,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-09-24 23:08:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:08:03,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:03,999 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:04,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:08:04,200 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:04,200 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:04,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -246404376, now seen corresponding path program 1 times [2024-09-24 23:08:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462975427] [2024-09-24 23:08:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:04,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:04,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:04,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462975427] [2024-09-24 23:08:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462975427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:04,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318799309] [2024-09-24 23:08:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:04,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:04,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:04,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:08:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:04,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:08:04,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:04,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318799309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:04,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:04,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-24 23:08:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561651110] [2024-09-24 23:08:04,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:04,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:08:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:08:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:08:04,679 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:04,739 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-24 23:08:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:08:04,740 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-24 23:08:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:04,741 INFO L225 Difference]: With dead ends: 27 [2024-09-24 23:08:04,741 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:08:04,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:08:04,744 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:04,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:08:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-09-24 23:08:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2024-09-24 23:08:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-09-24 23:08:04,750 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-09-24 23:08:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:04,750 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-09-24 23:08:04,750 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:04,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-09-24 23:08:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 23:08:04,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:04,752 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:04,769 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:04,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:04,956 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:04,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 986936693, now seen corresponding path program 2 times [2024-09-24 23:08:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:04,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402864702] [2024-09-24 23:08:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:05,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:05,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402864702] [2024-09-24 23:08:05,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402864702] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:05,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676060236] [2024-09-24 23:08:05,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:05,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:05,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:05,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:05,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:08:05,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:05,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:08:05,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676060236] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:05,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:05,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-24 23:08:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180049334] [2024-09-24 23:08:05,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:05,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:08:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:08:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:08:05,243 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-09-24 23:08:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:05,307 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-09-24 23:08:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 23:08:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 [2024-09-24 23:08:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:05,309 INFO L225 Difference]: With dead ends: 32 [2024-09-24 23:08:05,309 INFO L226 Difference]: Without dead ends: 23 [2024-09-24 23:08:05,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:08:05,310 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:05,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-24 23:08:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-24 23:08:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-09-24 23:08:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-09-24 23:08:05,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2024-09-24 23:08:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:05,317 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-09-24 23:08:05,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-09-24 23:08:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-09-24 23:08:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:05,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:05,318 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:05,334 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:08:05,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:08:05,519 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:05,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash -372821783, now seen corresponding path program 3 times [2024-09-24 23:08:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:05,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388170197] [2024-09-24 23:08:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:05,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388170197] [2024-09-24 23:08:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388170197] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409395930] [2024-09-24 23:08:05,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:05,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:05,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:05,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:08:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-24 23:08:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:05,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:08:05,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:05,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409395930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:05,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:05,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-24 23:08:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996698903] [2024-09-24 23:08:05,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:05,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:08:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:08:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:08:05,940 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:06,018 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-24 23:08:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:08:06,018 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-24 23:08:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:06,019 INFO L225 Difference]: With dead ends: 30 [2024-09-24 23:08:06,019 INFO L226 Difference]: Without dead ends: 25 [2024-09-24 23:08:06,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:08:06,021 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:06,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-24 23:08:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-24 23:08:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-09-24 23:08:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-09-24 23:08:06,035 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-09-24 23:08:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:06,035 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-09-24 23:08:06,035 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:06,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-09-24 23:08:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:06,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:06,040 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:06,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:06,241 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:06,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -957289368, now seen corresponding path program 4 times [2024-09-24 23:08:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:06,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153783491] [2024-09-24 23:08:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:06,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:06,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:06,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153783491] [2024-09-24 23:08:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153783491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428020994] [2024-09-24 23:08:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:06,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:06,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:08:06,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:06,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:06,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:08:06,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:06,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428020994] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:06,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-24 23:08:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601250104] [2024-09-24 23:08:06,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:06,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:08:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:08:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:06,512 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2024-09-24 23:08:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:06,675 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-24 23:08:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:08:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 16 [2024-09-24 23:08:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:06,676 INFO L225 Difference]: With dead ends: 41 [2024-09-24 23:08:06,676 INFO L226 Difference]: Without dead ends: 36 [2024-09-24 23:08:06,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:08:06,678 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:06,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:06,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-24 23:08:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-09-24 23:08:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2024-09-24 23:08:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-24 23:08:06,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2024-09-24 23:08:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:06,696 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-24 23:08:06,696 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2024-09-24 23:08:06,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-24 23:08:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 23:08:06,697 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:06,697 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:06,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:08:06,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-24 23:08:06,902 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:06,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1362964372, now seen corresponding path program 5 times [2024-09-24 23:08:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970747518] [2024-09-24 23:08:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:07,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:07,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970747518] [2024-09-24 23:08:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970747518] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934391897] [2024-09-24 23:08:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:07,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:07,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:07,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:08:07,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-24 23:08:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:07,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-24 23:08:07,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:07,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934391897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-09-24 23:08:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195439880] [2024-09-24 23:08:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:07,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:08:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:08:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:08:07,220 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2024-09-24 23:08:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:07,404 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-09-24 23:08:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:08:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 [2024-09-24 23:08:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:07,405 INFO L225 Difference]: With dead ends: 49 [2024-09-24 23:08:07,406 INFO L226 Difference]: Without dead ends: 39 [2024-09-24 23:08:07,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:07,406 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:07,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-24 23:08:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-09-24 23:08:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-24 23:08:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-24 23:08:07,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 17 [2024-09-24 23:08:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:07,422 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-24 23:08:07,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2024-09-24 23:08:07,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-24 23:08:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 23:08:07,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:07,426 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:07,442 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:08:07,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:07,627 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:07,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 305126920, now seen corresponding path program 6 times [2024-09-24 23:08:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103268630] [2024-09-24 23:08:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:07,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103268630] [2024-09-24 23:08:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103268630] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409502206] [2024-09-24 23:08:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:07,844 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) [2024-09-24 23:08:07,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:08:07,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-24 23:08:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:07,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-24 23:08:07,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:07,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409502206] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:08,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-09-24 23:08:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500538698] [2024-09-24 23:08:08,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:08,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:08:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:08:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:08,070 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:08,178 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-09-24 23:08:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:08:08,181 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-24 23:08:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:08,181 INFO L225 Difference]: With dead ends: 42 [2024-09-24 23:08:08,182 INFO L226 Difference]: Without dead ends: 37 [2024-09-24 23:08:08,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:08:08,182 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:08,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-24 23:08:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-09-24 23:08:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2024-09-24 23:08:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-24 23:08:08,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2024-09-24 23:08:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:08,196 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-24 23:08:08,197 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:08,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-24 23:08:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:08,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:08,198 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:08,216 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:08:08,399 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:08,399 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:08,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 904537685, now seen corresponding path program 7 times [2024-09-24 23:08:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:08,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003439557] [2024-09-24 23:08:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:08,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:08,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:08,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:08,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003439557] [2024-09-24 23:08:08,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003439557] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:08,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056414672] [2024-09-24 23:08:08,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:08,511 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) [2024-09-24 23:08:08,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:08:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:08,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-24 23:08:08,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:08,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056414672] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:08,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-24 23:08:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793802650] [2024-09-24 23:08:08,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:08,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:08:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:08:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:08:08,788 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2024-09-24 23:08:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:09,168 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-09-24 23:08:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-24 23:08:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 19 [2024-09-24 23:08:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:09,170 INFO L225 Difference]: With dead ends: 53 [2024-09-24 23:08:09,170 INFO L226 Difference]: Without dead ends: 42 [2024-09-24 23:08:09,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:08:09,173 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:09,173 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-24 23:08:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-09-24 23:08:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2024-09-24 23:08:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-24 23:08:09,185 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 19 [2024-09-24 23:08:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:09,185 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-24 23:08:09,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2024-09-24 23:08:09,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-24 23:08:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:09,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:09,186 INFO L216 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:09,203 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:08:09,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:09,391 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:09,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1748253035, now seen corresponding path program 2 times [2024-09-24 23:08:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:09,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565788432] [2024-09-24 23:08:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:09,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565788432] [2024-09-24 23:08:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565788432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309345266] [2024-09-24 23:08:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:09,514 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) [2024-09-24 23:08:09,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:08:09,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:09,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-24 23:08:09,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:09,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:09,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309345266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:09,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:09,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-24 23:08:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048250822] [2024-09-24 23:08:09,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:09,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:08:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:08:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:09,774 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2024-09-24 23:08:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:10,235 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2024-09-24 23:08:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-24 23:08:10,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 19 [2024-09-24 23:08:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:10,237 INFO L225 Difference]: With dead ends: 60 [2024-09-24 23:08:10,237 INFO L226 Difference]: Without dead ends: 55 [2024-09-24 23:08:10,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:08:10,238 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:10,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-24 23:08:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2024-09-24 23:08:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 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) [2024-09-24 23:08:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2024-09-24 23:08:10,251 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 19 [2024-09-24 23:08:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:10,251 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2024-09-24 23:08:10,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2024-09-24 23:08:10,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2024-09-24 23:08:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 23:08:10,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:10,252 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:10,270 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:08:10,456 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-24 23:08:10,457 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:10,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2064971831, now seen corresponding path program 8 times [2024-09-24 23:08:10,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:10,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763204145] [2024-09-24 23:08:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:10,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:10,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763204145] [2024-09-24 23:08:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763204145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021951603] [2024-09-24 23:08:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:10,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:10,683 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) [2024-09-24 23:08:10,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:08:10,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:10,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 23:08:10,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:10,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021951603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:10,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2024-09-24 23:08:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620997576] [2024-09-24 23:08:10,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:10,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:08:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:08:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:08:10,915 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:11,027 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-24 23:08:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:08:11,028 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-24 23:08:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:11,028 INFO L225 Difference]: With dead ends: 56 [2024-09-24 23:08:11,029 INFO L226 Difference]: Without dead ends: 51 [2024-09-24 23:08:11,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:08:11,030 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:11,032 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-24 23:08:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-09-24 23:08:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 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) [2024-09-24 23:08:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-09-24 23:08:11,044 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 20 [2024-09-24 23:08:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:11,044 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-09-24 23:08:11,044 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:11,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-09-24 23:08:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 23:08:11,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:11,046 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:11,062 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 23:08:11,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-24 23:08:11,247 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:11,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2036231191, now seen corresponding path program 9 times [2024-09-24 23:08:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:11,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995087692] [2024-09-24 23:08:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:11,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:11,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995087692] [2024-09-24 23:08:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995087692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:11,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236527221] [2024-09-24 23:08:11,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:11,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:11,370 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) [2024-09-24 23:08:11,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:08:11,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:08:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:11,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 23:08:11,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:11,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:11,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236527221] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:11,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:11,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-09-24 23:08:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410558934] [2024-09-24 23:08:11,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:11,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:08:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:08:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:08:11,640 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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) [2024-09-24 23:08:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:12,085 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2024-09-24 23:08:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:08:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 [2024-09-24 23:08:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:12,086 INFO L225 Difference]: With dead ends: 70 [2024-09-24 23:08:12,086 INFO L226 Difference]: Without dead ends: 65 [2024-09-24 23:08:12,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:08:12,087 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:12,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 157 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-24 23:08:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2024-09-24 23:08:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 40 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) [2024-09-24 23:08:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-09-24 23:08:12,112 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2024-09-24 23:08:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:12,113 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-09-24 23:08:12,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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) [2024-09-24 23:08:12,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-09-24 23:08:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 23:08:12,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:12,114 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:12,130 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:12,315 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:08:12,315 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:12,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash 445920436, now seen corresponding path program 10 times [2024-09-24 23:08:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:12,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515937292] [2024-09-24 23:08:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:12,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:12,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515937292] [2024-09-24 23:08:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515937292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100917194] [2024-09-24 23:08:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:12,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:12,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:12,441 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) [2024-09-24 23:08:12,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:08:12,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:12,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-24 23:08:12,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:12,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:12,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100917194] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:12,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:12,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-24 23:08:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145151104] [2024-09-24 23:08:12,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:12,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:08:12,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:08:12,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:08:12,740 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2024-09-24 23:08:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:13,289 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-24 23:08:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-24 23:08:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 [2024-09-24 23:08:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:13,290 INFO L225 Difference]: With dead ends: 76 [2024-09-24 23:08:13,291 INFO L226 Difference]: Without dead ends: 64 [2024-09-24 23:08:13,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2024-09-24 23:08:13,292 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:13,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-24 23:08:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-09-24 23:08:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 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) [2024-09-24 23:08:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-09-24 23:08:13,308 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 21 [2024-09-24 23:08:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:13,309 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-09-24 23:08:13,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2024-09-24 23:08:13,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-09-24 23:08:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-24 23:08:13,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:13,310 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:13,327 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:08:13,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:08:13,515 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:13,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1394439896, now seen corresponding path program 11 times [2024-09-24 23:08:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:13,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749784547] [2024-09-24 23:08:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:13,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:13,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:13,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749784547] [2024-09-24 23:08:13,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749784547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753802454] [2024-09-24 23:08:13,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:13,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:13,752 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) [2024-09-24 23:08:13,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:08:13,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-24 23:08:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:13,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-24 23:08:13,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:13,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753802454] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:14,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-09-24 23:08:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311905784] [2024-09-24 23:08:14,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:14,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:08:14,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:08:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:08:14,018 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:14,119 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-24 23:08:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:08:14,119 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-24 23:08:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:14,120 INFO L225 Difference]: With dead ends: 63 [2024-09-24 23:08:14,120 INFO L226 Difference]: Without dead ends: 58 [2024-09-24 23:08:14,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:08:14,121 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:14,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-24 23:08:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2024-09-24 23:08:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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) [2024-09-24 23:08:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-24 23:08:14,135 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 22 [2024-09-24 23:08:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:14,135 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-24 23:08:14,135 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:14,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-24 23:08:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-24 23:08:14,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:14,136 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:14,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-24 23:08:14,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:08:14,337 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:14,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -242426059, now seen corresponding path program 12 times [2024-09-24 23:08:14,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079288140] [2024-09-24 23:08:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:14,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:14,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079288140] [2024-09-24 23:08:14,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079288140] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654452393] [2024-09-24 23:08:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:14,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:14,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:14,525 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) [2024-09-24 23:08:14,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:08:14,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-24 23:08:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:14,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:08:14,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:14,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:14,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654452393] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:14,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2024-09-24 23:08:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765682239] [2024-09-24 23:08:14,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:14,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-24 23:08:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-24 23:08:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:08:14,843 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-24 23:08:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:15,613 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2024-09-24 23:08:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-24 23:08:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 [2024-09-24 23:08:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:15,614 INFO L225 Difference]: With dead ends: 90 [2024-09-24 23:08:15,614 INFO L226 Difference]: Without dead ends: 77 [2024-09-24 23:08:15,615 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2024-09-24 23:08:15,615 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:15,616 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-24 23:08:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2024-09-24 23:08:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 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) [2024-09-24 23:08:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-09-24 23:08:15,641 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 23 [2024-09-24 23:08:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:15,641 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-09-24 23:08:15,642 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-24 23:08:15,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-09-24 23:08:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 23:08:15,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:15,643 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:15,656 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 23:08:15,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:08:15,844 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 697820841, now seen corresponding path program 13 times [2024-09-24 23:08:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759649501] [2024-09-24 23:08:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:16,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759649501] [2024-09-24 23:08:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759649501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562876639] [2024-09-24 23:08:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:16,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:16,076 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) [2024-09-24 23:08:16,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:08:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:16,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:08:16,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:16,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562876639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:16,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:16,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2024-09-24 23:08:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496555089] [2024-09-24 23:08:16,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:16,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:08:16,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:08:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:16,337 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:16,508 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-24 23:08:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 23:08:16,509 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-24 23:08:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:16,510 INFO L225 Difference]: With dead ends: 72 [2024-09-24 23:08:16,510 INFO L226 Difference]: Without dead ends: 67 [2024-09-24 23:08:16,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:08:16,511 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:16,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 137 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-24 23:08:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-09-24 23:08:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 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) [2024-09-24 23:08:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2024-09-24 23:08:16,530 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 24 [2024-09-24 23:08:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:16,530 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2024-09-24 23:08:16,531 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:16,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2024-09-24 23:08:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 23:08:16,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:16,532 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:16,548 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:16,735 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-24 23:08:16,736 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:16,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -779828600, now seen corresponding path program 14 times [2024-09-24 23:08:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:16,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485966064] [2024-09-24 23:08:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:16,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:16,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:16,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485966064] [2024-09-24 23:08:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485966064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:16,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167496864] [2024-09-24 23:08:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:16,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:16,925 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) [2024-09-24 23:08:16,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:08:16,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:16,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:08:16,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:16,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167496864] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:17,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2024-09-24 23:08:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225748141] [2024-09-24 23:08:17,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:17,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-24 23:08:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-24 23:08:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2024-09-24 23:08:17,261 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2024-09-24 23:08:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:18,183 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2024-09-24 23:08:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-24 23:08:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 24 [2024-09-24 23:08:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:18,184 INFO L225 Difference]: With dead ends: 103 [2024-09-24 23:08:18,184 INFO L226 Difference]: Without dead ends: 98 [2024-09-24 23:08:18,185 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2024-09-24 23:08:18,185 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:18,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-24 23:08:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2024-09-24 23:08:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 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) [2024-09-24 23:08:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2024-09-24 23:08:18,202 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 24 [2024-09-24 23:08:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:18,202 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2024-09-24 23:08:18,202 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2024-09-24 23:08:18,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2024-09-24 23:08:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:08:18,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:18,203 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:18,215 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:18,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:18,404 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:18,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 193147348, now seen corresponding path program 15 times [2024-09-24 23:08:18,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:18,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090076328] [2024-09-24 23:08:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:18,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090076328] [2024-09-24 23:08:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090076328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958160475] [2024-09-24 23:08:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:18,612 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) [2024-09-24 23:08:18,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 23:08:18,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-24 23:08:18,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:18,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-24 23:08:18,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:18,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958160475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:19,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:19,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2024-09-24 23:08:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626136881] [2024-09-24 23:08:19,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:19,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-24 23:08:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-24 23:08:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:08:19,087 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-09-24 23:08:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:20,296 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2024-09-24 23:08:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-24 23:08:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 [2024-09-24 23:08:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:20,297 INFO L225 Difference]: With dead ends: 111 [2024-09-24 23:08:20,297 INFO L226 Difference]: Without dead ends: 97 [2024-09-24 23:08:20,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2024-09-24 23:08:20,298 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:20,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-24 23:08:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2024-09-24 23:08:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 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) [2024-09-24 23:08:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-09-24 23:08:20,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 25 [2024-09-24 23:08:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:20,325 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-09-24 23:08:20,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-09-24 23:08:20,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-09-24 23:08:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:08:20,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:20,326 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:20,343 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-24 23:08:20,530 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:20,531 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:20,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1827286088, now seen corresponding path program 16 times [2024-09-24 23:08:20,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:20,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953106464] [2024-09-24 23:08:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:21,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953106464] [2024-09-24 23:08:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953106464] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25561662] [2024-09-24 23:08:21,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:21,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:21,198 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) [2024-09-24 23:08:21,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:08:21,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:21,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:21,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-24 23:08:21,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:21,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25561662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:21,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 37 [2024-09-24 23:08:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896590307] [2024-09-24 23:08:21,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:21,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-24 23:08:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-24 23:08:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2024-09-24 23:08:21,730 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:23,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:08:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:23,389 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-24 23:08:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:08:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-24 23:08:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:23,390 INFO L225 Difference]: With dead ends: 81 [2024-09-24 23:08:23,390 INFO L226 Difference]: Without dead ends: 76 [2024-09-24 23:08:23,391 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:08:23,391 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:23,392 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-24 23:08:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-24 23:08:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2024-09-24 23:08:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 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) [2024-09-24 23:08:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2024-09-24 23:08:23,417 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 26 [2024-09-24 23:08:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:23,417 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2024-09-24 23:08:23,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:23,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2024-09-24 23:08:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 23:08:23,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:23,418 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:23,432 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:23,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-24 23:08:23,619 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:23,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 846831637, now seen corresponding path program 17 times [2024-09-24 23:08:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58780567] [2024-09-24 23:08:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:23,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:23,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:23,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58780567] [2024-09-24 23:08:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58780567] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156836181] [2024-09-24 23:08:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:23,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:23,875 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) [2024-09-24 23:08:23,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:08:23,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-24 23:08:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:23,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-24 23:08:23,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:24,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:24,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156836181] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:24,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-24 23:08:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150532405] [2024-09-24 23:08:24,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:24,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 23:08:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 23:08:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 23:08:24,508 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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) [2024-09-24 23:08:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:26,488 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2024-09-24 23:08:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-24 23:08:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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 27 [2024-09-24 23:08:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:26,489 INFO L225 Difference]: With dead ends: 124 [2024-09-24 23:08:26,489 INFO L226 Difference]: Without dead ends: 109 [2024-09-24 23:08:26,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2024-09-24 23:08:26,491 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:26,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 195 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-24 23:08:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2024-09-24 23:08:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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) [2024-09-24 23:08:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-24 23:08:26,526 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 27 [2024-09-24 23:08:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:26,527 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-24 23:08:26,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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) [2024-09-24 23:08:26,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-24 23:08:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:08:26,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:26,528 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:26,545 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-24 23:08:26,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-24 23:08:26,733 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash -703869559, now seen corresponding path program 18 times [2024-09-24 23:08:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099389062] [2024-09-24 23:08:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099389062] [2024-09-24 23:08:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099389062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990390365] [2024-09-24 23:08:27,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:27,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:27,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:27,436 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) [2024-09-24 23:08:27,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:08:27,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-24 23:08:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:27,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-24 23:08:27,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990390365] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:28,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 41 [2024-09-24 23:08:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452515339] [2024-09-24 23:08:28,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:28,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-24 23:08:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-24 23:08:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:08:28,183 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:28,697 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2024-09-24 23:08:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-24 23:08:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-24 23:08:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:28,699 INFO L225 Difference]: With dead ends: 92 [2024-09-24 23:08:28,699 INFO L226 Difference]: Without dead ends: 87 [2024-09-24 23:08:28,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=1584, Unknown=0, NotChecked=0, Total=1722 [2024-09-24 23:08:28,700 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:28,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:08:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-24 23:08:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2024-09-24 23:08:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 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) [2024-09-24 23:08:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-09-24 23:08:28,739 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2024-09-24 23:08:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:28,740 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-09-24 23:08:28,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-09-24 23:08:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:08:28,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:28,744 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:28,762 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-24 23:08:28,945 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-24 23:08:28,945 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:28,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash 832785865, now seen corresponding path program 19 times [2024-09-24 23:08:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:28,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564177762] [2024-09-24 23:08:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:28,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564177762] [2024-09-24 23:08:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564177762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547242471] [2024-09-24 23:08:29,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:29,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:29,227 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) [2024-09-24 23:08:29,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:08:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-24 23:08:29,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:29,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:29,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547242471] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:29,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:29,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-09-24 23:08:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683974853] [2024-09-24 23:08:29,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:29,772 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-24 23:08:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-24 23:08:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:08:29,773 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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) [2024-09-24 23:08:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:31,968 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-09-24 23:08:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-24 23:08:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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 28 [2024-09-24 23:08:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:31,969 INFO L225 Difference]: With dead ends: 146 [2024-09-24 23:08:31,969 INFO L226 Difference]: Without dead ends: 141 [2024-09-24 23:08:31,970 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=691, Invalid=2969, Unknown=0, NotChecked=0, Total=3660 [2024-09-24 23:08:31,971 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:31,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 283 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-24 23:08:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2024-09-24 23:08:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 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) [2024-09-24 23:08:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2024-09-24 23:08:32,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 28 [2024-09-24 23:08:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:32,005 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2024-09-24 23:08:32,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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) [2024-09-24 23:08:32,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2024-09-24 23:08:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-24 23:08:32,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:32,006 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:32,018 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:32,206 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:08:32,206 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:32,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -309582092, now seen corresponding path program 20 times [2024-09-24 23:08:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936192451] [2024-09-24 23:08:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:32,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936192451] [2024-09-24 23:08:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936192451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977536628] [2024-09-24 23:08:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:32,508 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) [2024-09-24 23:08:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-24 23:08:32,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:32,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:32,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:08:32,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:32,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977536628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:33,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:33,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-24 23:08:33,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490825713] [2024-09-24 23:08:33,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:33,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-24 23:08:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-24 23:08:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-24 23:08:33,182 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2024-09-24 23:08:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:36,161 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2024-09-24 23:08:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-24 23:08:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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 [2024-09-24 23:08:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:36,162 INFO L225 Difference]: With dead ends: 149 [2024-09-24 23:08:36,162 INFO L226 Difference]: Without dead ends: 133 [2024-09-24 23:08:36,165 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1204, Invalid=6806, Unknown=0, NotChecked=0, Total=8010 [2024-09-24 23:08:36,165 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:36,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 221 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-24 23:08:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-24 23:08:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 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) [2024-09-24 23:08:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2024-09-24 23:08:36,217 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 29 [2024-09-24 23:08:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:36,217 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2024-09-24 23:08:36,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2024-09-24 23:08:36,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2024-09-24 23:08:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-24 23:08:36,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:36,218 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:36,230 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-24 23:08:36,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-24 23:08:36,418 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:36,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:36,419 INFO L85 PathProgramCache]: Analyzing trace with hash -179779736, now seen corresponding path program 21 times [2024-09-24 23:08:36,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:36,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170750180] [2024-09-24 23:08:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:36,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:37,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170750180] [2024-09-24 23:08:37,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170750180] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997942538] [2024-09-24 23:08:37,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:37,274 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) [2024-09-24 23:08:37,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-24 23:08:37,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-24 23:08:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:37,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-24 23:08:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:37,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:38,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997942538] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:38,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 14] total 45 [2024-09-24 23:08:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40253991] [2024-09-24 23:08:38,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:38,136 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-24 23:08:38,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-24 23:08:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2024-09-24 23:08:38,137 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:38,704 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2024-09-24 23:08:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:08:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-24 23:08:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:38,705 INFO L225 Difference]: With dead ends: 105 [2024-09-24 23:08:38,705 INFO L226 Difference]: Without dead ends: 100 [2024-09-24 23:08:38,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2024-09-24 23:08:38,706 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:38,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 169 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:08:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-24 23:08:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2024-09-24 23:08:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 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) [2024-09-24 23:08:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2024-09-24 23:08:38,753 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 30 [2024-09-24 23:08:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:38,753 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2024-09-24 23:08:38,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:38,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2024-09-24 23:08:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:08:38,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:38,754 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:38,767 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-24 23:08:38,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-24 23:08:38,955 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:38,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:38,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1242666763, now seen corresponding path program 22 times [2024-09-24 23:08:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878762926] [2024-09-24 23:08:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:39,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878762926] [2024-09-24 23:08:39,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878762926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842671928] [2024-09-24 23:08:39,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:39,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:39,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:39,281 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) [2024-09-24 23:08:39,282 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-24 23:08:39,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:39,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-24 23:08:39,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:39,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:39,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842671928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:39,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:39,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-24 23:08:39,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324675244] [2024-09-24 23:08:39,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:39,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-24 23:08:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-24 23:08:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-24 23:08:39,953 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2024-09-24 23:08:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:44,054 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2024-09-24 23:08:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-09-24 23:08:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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 [2024-09-24 23:08:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:44,055 INFO L225 Difference]: With dead ends: 164 [2024-09-24 23:08:44,055 INFO L226 Difference]: Without dead ends: 147 [2024-09-24 23:08:44,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1633, Invalid=9287, Unknown=0, NotChecked=0, Total=10920 [2024-09-24 23:08:44,058 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:44,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-24 23:08:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2024-09-24 23:08:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 97 states have internal predecessors, (130), 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) [2024-09-24 23:08:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2024-09-24 23:08:44,123 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 31 [2024-09-24 23:08:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:44,123 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2024-09-24 23:08:44,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2024-09-24 23:08:44,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2024-09-24 23:08:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:08:44,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:44,124 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:44,138 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:44,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-24 23:08:44,325 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:44,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1056654231, now seen corresponding path program 23 times [2024-09-24 23:08:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:44,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822313619] [2024-09-24 23:08:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:44,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:45,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:45,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822313619] [2024-09-24 23:08:45,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822313619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943181124] [2024-09-24 23:08:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:45,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:45,190 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) [2024-09-24 23:08:45,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-24 23:08:45,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-24 23:08:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:45,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-24 23:08:45,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:45,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943181124] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:46,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 49 [2024-09-24 23:08:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020960462] [2024-09-24 23:08:46,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,151 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-24 23:08:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-24 23:08:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:08:46,152 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:47,282 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2024-09-24 23:08:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:08:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-24 23:08:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:47,284 INFO L225 Difference]: With dead ends: 118 [2024-09-24 23:08:47,284 INFO L226 Difference]: Without dead ends: 113 [2024-09-24 23:08:47,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2024-09-24 23:08:47,285 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:47,285 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 233 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-24 23:08:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-24 23:08:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-09-24 23:08:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.34375) internal successors, (129), 96 states have internal predecessors, (129), 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) [2024-09-24 23:08:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2024-09-24 23:08:47,342 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 32 [2024-09-24 23:08:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:47,342 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2024-09-24 23:08:47,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:47,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2024-09-24 23:08:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:08:47,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:47,343 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:47,357 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-24 23:08:47,543 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-24 23:08:47,544 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:47,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 126816424, now seen corresponding path program 24 times [2024-09-24 23:08:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818433551] [2024-09-24 23:08:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:47,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818433551] [2024-09-24 23:08:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818433551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:47,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639438925] [2024-09-24 23:08:47,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:47,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:47,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:47,915 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) [2024-09-24 23:08:47,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-24 23:08:48,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-24 23:08:48,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:48,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-24 23:08:48,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:48,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639438925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:48,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-09-24 23:08:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324728629] [2024-09-24 23:08:48,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:48,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-24 23:08:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-24 23:08:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2024-09-24 23:08:48,707 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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) [2024-09-24 23:08:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:53,273 INFO L93 Difference]: Finished difference Result 197 states and 265 transitions. [2024-09-24 23:08:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-24 23:08:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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 32 [2024-09-24 23:08:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:53,274 INFO L225 Difference]: With dead ends: 197 [2024-09-24 23:08:53,274 INFO L226 Difference]: Without dead ends: 192 [2024-09-24 23:08:53,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1059, Invalid=4793, Unknown=0, NotChecked=0, Total=5852 [2024-09-24 23:08:53,276 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:53,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 364 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:08:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-24 23:08:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 108. [2024-09-24 23:08:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 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) [2024-09-24 23:08:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2024-09-24 23:08:53,342 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 32 [2024-09-24 23:08:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:53,342 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2024-09-24 23:08:53,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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) [2024-09-24 23:08:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2024-09-24 23:08:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:08:53,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:53,343 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:53,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:53,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:53,544 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:53,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1638994964, now seen corresponding path program 25 times [2024-09-24 23:08:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:53,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729994765] [2024-09-24 23:08:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:53,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729994765] [2024-09-24 23:08:53,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729994765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009132713] [2024-09-24 23:08:53,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:53,871 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) [2024-09-24 23:08:53,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-24 23:08:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:53,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-24 23:08:53,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:53,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009132713] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:54,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:54,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-24 23:08:54,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881843474] [2024-09-24 23:08:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:54,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-24 23:08:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-24 23:08:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-24 23:08:54,693 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-09-24 23:09:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:00,171 INFO L93 Difference]: Finished difference Result 192 states and 251 transitions. [2024-09-24 23:09:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-24 23:09:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 [2024-09-24 23:09:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:00,172 INFO L225 Difference]: With dead ends: 192 [2024-09-24 23:09:00,173 INFO L226 Difference]: Without dead ends: 174 [2024-09-24 23:09:00,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2165, Invalid=12355, Unknown=0, NotChecked=0, Total=14520 [2024-09-24 23:09:00,174 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:00,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 241 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:09:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-24 23:09:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 115. [2024-09-24 23:09:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 110 states have internal predecessors, (148), 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) [2024-09-24 23:09:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2024-09-24 23:09:00,255 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 33 [2024-09-24 23:09:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:00,256 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2024-09-24 23:09:00,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-09-24 23:09:00,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2024-09-24 23:09:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:09:00,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:00,256 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:00,269 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-24 23:09:00,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:00,457 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:00,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 8411784, now seen corresponding path program 26 times [2024-09-24 23:09:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871306820] [2024-09-24 23:09:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:01,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871306820] [2024-09-24 23:09:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871306820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174644104] [2024-09-24 23:09:01,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:01,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:01,462 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) [2024-09-24 23:09:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-24 23:09:01,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:01,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-24 23:09:01,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:01,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174644104] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:02,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2024-09-24 23:09:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763094061] [2024-09-24 23:09:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:02,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-24 23:09:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-24 23:09:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2024-09-24 23:09:02,559 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:03,219 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2024-09-24 23:09:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-24 23:09:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-24 23:09:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:03,220 INFO L225 Difference]: With dead ends: 132 [2024-09-24 23:09:03,220 INFO L226 Difference]: Without dead ends: 127 [2024-09-24 23:09:03,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2024-09-24 23:09:03,221 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:03,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 225 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:09:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-24 23:09:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2024-09-24 23:09:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.348623853211009) internal successors, (147), 109 states have internal predecessors, (147), 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) [2024-09-24 23:09:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2024-09-24 23:09:03,315 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 34 [2024-09-24 23:09:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:03,316 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2024-09-24 23:09:03,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:03,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2024-09-24 23:09:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:09:03,317 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:03,317 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:03,330 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-24 23:09:03,517 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:03,518 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:03,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 296303061, now seen corresponding path program 27 times [2024-09-24 23:09:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:03,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38122706] [2024-09-24 23:09:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:03,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38122706] [2024-09-24 23:09:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38122706] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070385742] [2024-09-24 23:09:03,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:03,905 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) [2024-09-24 23:09:03,906 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-24 23:09:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-24 23:09:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:03,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-24 23:09:03,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:04,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070385742] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:04,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:04,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 52 [2024-09-24 23:09:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609514981] [2024-09-24 23:09:04,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:04,823 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-24 23:09:04,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-24 23:09:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2024-09-24 23:09:04,824 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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) [2024-09-24 23:09:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:12,447 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2024-09-24 23:09:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-09-24 23:09:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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 35 [2024-09-24 23:09:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:12,448 INFO L225 Difference]: With dead ends: 209 [2024-09-24 23:09:12,448 INFO L226 Difference]: Without dead ends: 190 [2024-09-24 23:09:12,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2815, Invalid=16091, Unknown=0, NotChecked=0, Total=18906 [2024-09-24 23:09:12,450 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:12,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 260 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:09:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-24 23:09:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2024-09-24 23:09:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 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) [2024-09-24 23:09:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2024-09-24 23:09:12,579 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 35 [2024-09-24 23:09:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:12,579 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2024-09-24 23:09:12,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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) [2024-09-24 23:09:12,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2024-09-24 23:09:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:09:12,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:12,580 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:12,596 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-24 23:09:12,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:12,785 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash 968930121, now seen corresponding path program 28 times [2024-09-24 23:09:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911655239] [2024-09-24 23:09:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:13,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:13,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:13,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911655239] [2024-09-24 23:09:13,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911655239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:13,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791179192] [2024-09-24 23:09:13,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:09:13,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:13,843 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) [2024-09-24 23:09:13,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-24 23:09:13,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:09:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:13,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-24 23:09:13,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:14,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791179192] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:15,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:15,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 57 [2024-09-24 23:09:15,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036819996] [2024-09-24 23:09:15,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:15,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-24 23:09:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-24 23:09:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3004, Unknown=0, NotChecked=0, Total=3192 [2024-09-24 23:09:15,097 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:15,944 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2024-09-24 23:09:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-24 23:09:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-24 23:09:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:15,945 INFO L225 Difference]: With dead ends: 147 [2024-09-24 23:09:15,945 INFO L226 Difference]: Without dead ends: 142 [2024-09-24 23:09:15,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=3112, Unknown=0, NotChecked=0, Total=3306 [2024-09-24 23:09:15,946 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:15,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:09:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-24 23:09:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2024-09-24 23:09:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 123 states have internal predecessors, (166), 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) [2024-09-24 23:09:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 170 transitions. [2024-09-24 23:09:16,061 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 170 transitions. Word has length 36 [2024-09-24 23:09:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:16,061 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 170 transitions. [2024-09-24 23:09:16,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:16,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 170 transitions. [2024-09-24 23:09:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:09:16,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:16,062 INFO L216 NwaCegarLoop]: trace histogram [18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:16,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-24 23:09:16,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-24 23:09:16,262 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:16,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -294547543, now seen corresponding path program 29 times [2024-09-24 23:09:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:16,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738439694] [2024-09-24 23:09:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:16,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738439694] [2024-09-24 23:09:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738439694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164803435] [2024-09-24 23:09:16,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:09:16,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:16,739 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) [2024-09-24 23:09:16,741 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-24 23:09:16,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-24 23:09:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:16,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-24 23:09:16,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:16,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164803435] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:17,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2024-09-24 23:09:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972334179] [2024-09-24 23:09:17,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:17,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-24 23:09:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-24 23:09:17,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2024-09-24 23:09:17,795 INFO L87 Difference]: Start difference. First operand 128 states and 170 transitions. Second operand has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2024-09-24 23:09:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:26,155 INFO L93 Difference]: Finished difference Result 255 states and 344 transitions. [2024-09-24 23:09:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-24 23:09:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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 [2024-09-24 23:09:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:26,157 INFO L225 Difference]: With dead ends: 255 [2024-09-24 23:09:26,157 INFO L226 Difference]: Without dead ends: 250 [2024-09-24 23:09:26,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1525, Invalid=7217, Unknown=0, NotChecked=0, Total=8742 [2024-09-24 23:09:26,158 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 241 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:26,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 449 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:09:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-09-24 23:09:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 135. [2024-09-24 23:09:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.376923076923077) internal successors, (179), 130 states have internal predecessors, (179), 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) [2024-09-24 23:09:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 183 transitions. [2024-09-24 23:09:26,276 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 183 transitions. Word has length 36 [2024-09-24 23:09:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:26,277 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 183 transitions. [2024-09-24 23:09:26,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2024-09-24 23:09:26,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 183 transitions. [2024-09-24 23:09:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-24 23:09:26,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:26,277 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:26,292 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:26,478 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-24 23:09:26,478 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:26,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 7600436, now seen corresponding path program 30 times [2024-09-24 23:09:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:26,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554054850] [2024-09-24 23:09:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:26,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554054850] [2024-09-24 23:09:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554054850] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661599723] [2024-09-24 23:09:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:09:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:26,871 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) [2024-09-24 23:09:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-24 23:09:26,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-24 23:09:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:26,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-24 23:09:26,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:27,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661599723] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:27,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-24 23:09:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925034365] [2024-09-24 23:09:27,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:27,925 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-24 23:09:27,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-24 23:09:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-24 23:09:27,926 INFO L87 Difference]: Start difference. First operand 135 states and 183 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 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) [2024-09-24 23:09:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:37,896 INFO L93 Difference]: Finished difference Result 240 states and 316 transitions. [2024-09-24 23:09:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-09-24 23:09:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 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 37 [2024-09-24 23:09:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:37,898 INFO L225 Difference]: With dead ends: 240 [2024-09-24 23:09:37,898 INFO L226 Difference]: Without dead ends: 220 [2024-09-24 23:09:37,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5288 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3599, Invalid=20581, Unknown=0, NotChecked=0, Total=24180 [2024-09-24 23:09:37,900 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:37,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 295 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:09:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-24 23:09:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 143. [2024-09-24 23:09:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 138 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) [2024-09-24 23:09:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2024-09-24 23:09:38,059 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 37 [2024-09-24 23:09:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:38,059 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2024-09-24 23:09:38,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 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) [2024-09-24 23:09:38,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2024-09-24 23:09:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:09:38,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:38,060 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:38,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:38,260 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-24 23:09:38,261 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:38,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2137856600, now seen corresponding path program 31 times [2024-09-24 23:09:38,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:38,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331981402] [2024-09-24 23:09:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:38,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:39,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331981402] [2024-09-24 23:09:39,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331981402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:39,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930503376] [2024-09-24 23:09:39,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:09:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:39,270 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) [2024-09-24 23:09:39,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-24 23:09:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:39,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-24 23:09:39,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:39,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930503376] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:40,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 61 [2024-09-24 23:09:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894989939] [2024-09-24 23:09:40,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:40,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-24 23:09:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-24 23:09:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2024-09-24 23:09:40,651 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:41,594 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-24 23:09:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-24 23:09:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-24 23:09:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:41,595 INFO L225 Difference]: With dead ends: 162 [2024-09-24 23:09:41,595 INFO L226 Difference]: Without dead ends: 157 [2024-09-24 23:09:41,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=3574, Unknown=0, NotChecked=0, Total=3782 [2024-09-24 23:09:41,596 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:41,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:09:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-24 23:09:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2024-09-24 23:09:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 137 states have internal predecessors, (185), 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) [2024-09-24 23:09:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2024-09-24 23:09:41,779 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 38 [2024-09-24 23:09:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:41,780 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2024-09-24 23:09:41,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:41,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2024-09-24 23:09:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-24 23:09:41,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:41,781 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:41,793 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-24 23:09:41,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-24 23:09:41,981 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1813507403, now seen corresponding path program 32 times [2024-09-24 23:09:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:41,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753175765] [2024-09-24 23:09:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:42,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753175765] [2024-09-24 23:09:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753175765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727669539] [2024-09-24 23:09:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:42,425 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) [2024-09-24 23:09:42,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-24 23:09:42,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:42,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:42,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-24 23:09:42,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:42,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727669539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:43,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:43,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2024-09-24 23:09:43,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492975891] [2024-09-24 23:09:43,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:43,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-24 23:09:43,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-24 23:09:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2024-09-24 23:09:43,564 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-09-24 23:09:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:56,665 INFO L93 Difference]: Finished difference Result 259 states and 342 transitions. [2024-09-24 23:09:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2024-09-24 23:09:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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 [2024-09-24 23:09:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:56,666 INFO L225 Difference]: With dead ends: 259 [2024-09-24 23:09:56,666 INFO L226 Difference]: Without dead ends: 238 [2024-09-24 23:09:56,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6947 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4534, Invalid=25916, Unknown=0, NotChecked=0, Total=30450 [2024-09-24 23:09:56,669 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:56,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 306 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:09:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-24 23:09:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 159. [2024-09-24 23:09:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 154 states have internal predecessors, (208), 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) [2024-09-24 23:09:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2024-09-24 23:09:56,912 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 39 [2024-09-24 23:09:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:56,912 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2024-09-24 23:09:56,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-09-24 23:09:56,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2024-09-24 23:09:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-24 23:09:56,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:56,913 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:56,925 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:57,113 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-24 23:09:57,114 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:57,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2013416919, now seen corresponding path program 33 times [2024-09-24 23:09:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341555485] [2024-09-24 23:09:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:58,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341555485] [2024-09-24 23:09:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341555485] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365930463] [2024-09-24 23:09:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:58,446 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) [2024-09-24 23:09:58,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-24 23:09:58,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-24 23:09:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:58,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-24 23:09:58,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:58,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:00,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365930463] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:00,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:00,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 65 [2024-09-24 23:10:00,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582056576] [2024-09-24 23:10:00,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:00,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-24 23:10:00,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-24 23:10:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3944, Unknown=0, NotChecked=0, Total=4160 [2024-09-24 23:10:00,133 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:01,279 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2024-09-24 23:10:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-24 23:10:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-24 23:10:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:01,281 INFO L225 Difference]: With dead ends: 179 [2024-09-24 23:10:01,281 INFO L226 Difference]: Without dead ends: 174 [2024-09-24 23:10:01,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=222, Invalid=4068, Unknown=0, NotChecked=0, Total=4290 [2024-09-24 23:10:01,282 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:01,282 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:10:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-24 23:10:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2024-09-24 23:10:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 153 states have internal predecessors, (207), 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) [2024-09-24 23:10:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2024-09-24 23:10:01,541 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 40 [2024-09-24 23:10:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:01,541 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2024-09-24 23:10:01,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:01,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2024-09-24 23:10:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-24 23:10:01,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:01,542 INFO L216 NwaCegarLoop]: trace histogram [21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:01,554 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-24 23:10:01,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-24 23:10:01,743 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:01,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash -640559416, now seen corresponding path program 34 times [2024-09-24 23:10:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:01,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738745478] [2024-09-24 23:10:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:01,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:02,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738745478] [2024-09-24 23:10:02,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738745478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264569627] [2024-09-24 23:10:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:10:02,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:02,243 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) [2024-09-24 23:10:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-24 23:10:02,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:10:02,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:02,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-24 23:10:02,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:02,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:03,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264569627] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:03,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2024-09-24 23:10:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610325011] [2024-09-24 23:10:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:03,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-24 23:10:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-24 23:10:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=3227, Unknown=0, NotChecked=0, Total=3906 [2024-09-24 23:10:03,522 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2024-09-24 23:10:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:18,206 INFO L93 Difference]: Finished difference Result 320 states and 432 transitions. [2024-09-24 23:10:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-09-24 23:10:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 40 [2024-09-24 23:10:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:18,208 INFO L225 Difference]: With dead ends: 320 [2024-09-24 23:10:18,208 INFO L226 Difference]: Without dead ends: 315 [2024-09-24 23:10:18,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=2100, Invalid=10332, Unknown=0, NotChecked=0, Total=12432 [2024-09-24 23:10:18,209 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:18,209 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 519 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:10:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-09-24 23:10:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 165. [2024-09-24 23:10:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.375) internal successors, (220), 160 states have internal predecessors, (220), 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) [2024-09-24 23:10:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 224 transitions. [2024-09-24 23:10:18,435 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 224 transitions. Word has length 40 [2024-09-24 23:10:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:18,436 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 224 transitions. [2024-09-24 23:10:18,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2024-09-24 23:10:18,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 224 transitions. [2024-09-24 23:10:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:10:18,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:18,437 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:18,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-24 23:10:18,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-24 23:10:18,638 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:18,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2044122708, now seen corresponding path program 35 times [2024-09-24 23:10:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149859301] [2024-09-24 23:10:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:19,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149859301] [2024-09-24 23:10:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149859301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614739166] [2024-09-24 23:10:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:10:19,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:19,108 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) [2024-09-24 23:10:19,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-24 23:10:19,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-24 23:10:19,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:19,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-24 23:10:19,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:19,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614739166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:20,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:20,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 64 [2024-09-24 23:10:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418754012] [2024-09-24 23:10:20,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:20,615 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-24 23:10:20,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-24 23:10:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2024-09-24 23:10:20,616 INFO L87 Difference]: Start difference. First operand 165 states and 224 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 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) [2024-09-24 23:10:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:37,451 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2024-09-24 23:10:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2024-09-24 23:10:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 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 41 [2024-09-24 23:10:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:37,452 INFO L225 Difference]: With dead ends: 293 [2024-09-24 23:10:37,452 INFO L226 Difference]: Without dead ends: 271 [2024-09-24 23:10:37,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5638, Invalid=32192, Unknown=0, NotChecked=0, Total=37830 [2024-09-24 23:10:37,454 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:37,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 348 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:10:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-09-24 23:10:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 174. [2024-09-24 23:10:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.349112426035503) internal successors, (228), 169 states have internal predecessors, (228), 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) [2024-09-24 23:10:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 232 transitions. [2024-09-24 23:10:37,739 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 232 transitions. Word has length 41 [2024-09-24 23:10:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:37,739 INFO L474 AbstractCegarLoop]: Abstraction has 174 states and 232 transitions. [2024-09-24 23:10:37,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 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) [2024-09-24 23:10:37,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 232 transitions. [2024-09-24 23:10:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-24 23:10:37,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:37,741 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:37,757 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-24 23:10:37,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-24 23:10:37,941 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:37,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:37,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1090361144, now seen corresponding path program 36 times [2024-09-24 23:10:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:37,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155868391] [2024-09-24 23:10:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:37,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:39,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:39,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155868391] [2024-09-24 23:10:39,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155868391] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:39,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775403629] [2024-09-24 23:10:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:10:39,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:39,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:39,445 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) [2024-09-24 23:10:39,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-24 23:10:39,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-24 23:10:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:39,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-24 23:10:39,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:40,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775403629] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:41,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20, 20] total 69 [2024-09-24 23:10:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324214343] [2024-09-24 23:10:41,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:41,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-24 23:10:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-24 23:10:41,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4462, Unknown=0, NotChecked=0, Total=4692 [2024-09-24 23:10:41,230 INFO L87 Difference]: Start difference. First operand 174 states and 232 transitions. Second operand has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:45,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:46,693 INFO L93 Difference]: Finished difference Result 195 states and 253 transitions. [2024-09-24 23:10:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-24 23:10:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-24 23:10:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:46,695 INFO L225 Difference]: With dead ends: 195 [2024-09-24 23:10:46,695 INFO L226 Difference]: Without dead ends: 190 [2024-09-24 23:10:46,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=4594, Unknown=0, NotChecked=0, Total=4830 [2024-09-24 23:10:46,696 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:46,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 289 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1245 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-24 23:10:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-24 23:10:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2024-09-24 23:10:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.3511904761904763) internal successors, (227), 168 states have internal predecessors, (227), 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) [2024-09-24 23:10:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2024-09-24 23:10:47,035 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 42 [2024-09-24 23:10:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:47,035 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2024-09-24 23:10:47,035 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:47,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2024-09-24 23:10:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 23:10:47,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:47,036 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:47,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-24 23:10:47,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:47,237 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:47,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash 594080661, now seen corresponding path program 37 times [2024-09-24 23:10:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:47,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282687975] [2024-09-24 23:10:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:47,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:47,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:47,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282687975] [2024-09-24 23:10:47,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282687975] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:47,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204186284] [2024-09-24 23:10:47,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:10:47,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:47,949 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) [2024-09-24 23:10:47,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-24 23:10:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:48,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-24 23:10:48,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:48,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204186284] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:49,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 68 [2024-09-24 23:10:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379919624] [2024-09-24 23:10:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:49,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-24 23:10:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-24 23:10:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=3909, Unknown=0, NotChecked=0, Total=4556 [2024-09-24 23:10:49,471 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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) [2024-09-24 23:11:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:11,433 INFO L93 Difference]: Finished difference Result 314 states and 417 transitions. [2024-09-24 23:11:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-09-24 23:11:11,433 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 [2024-09-24 23:11:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:11,435 INFO L225 Difference]: With dead ends: 314 [2024-09-24 23:11:11,435 INFO L226 Difference]: Without dead ends: 291 [2024-09-24 23:11:11,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11390 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=6930, Invalid=39510, Unknown=0, NotChecked=0, Total=46440 [2024-09-24 23:11:11,438 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:11,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 411 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:11:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-09-24 23:11:11,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2024-09-24 23:11:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.3529411764705883) internal successors, (253), 187 states have internal predecessors, (253), 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) [2024-09-24 23:11:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 257 transitions. [2024-09-24 23:11:11,883 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 257 transitions. Word has length 43 [2024-09-24 23:11:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:11,883 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 257 transitions. [2024-09-24 23:11:11,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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) [2024-09-24 23:11:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 257 transitions. [2024-09-24 23:11:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:11:11,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:11,884 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:11,900 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-24 23:11:12,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:12,089 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:12,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash -872826615, now seen corresponding path program 38 times [2024-09-24 23:11:12,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:12,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023070095] [2024-09-24 23:11:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:13,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:13,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023070095] [2024-09-24 23:11:13,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023070095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942367937] [2024-09-24 23:11:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:11:13,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:13,602 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) [2024-09-24 23:11:13,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-24 23:11:13,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:11:13,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:13,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-24 23:11:13,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:14,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942367937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:15,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21, 21] total 73 [2024-09-24 23:11:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641224406] [2024-09-24 23:11:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:15,645 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-24 23:11:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-24 23:11:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5012, Unknown=0, NotChecked=0, Total=5256 [2024-09-24 23:11:15,646 INFO L87 Difference]: Start difference. First operand 192 states and 257 transitions. Second operand has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:17,235 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2024-09-24 23:11:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-24 23:11:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-24 23:11:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:17,236 INFO L225 Difference]: With dead ends: 214 [2024-09-24 23:11:17,236 INFO L226 Difference]: Without dead ends: 209 [2024-09-24 23:11:17,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=250, Invalid=5152, Unknown=0, NotChecked=0, Total=5402 [2024-09-24 23:11:17,237 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:17,237 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-24 23:11:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-09-24 23:11:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2024-09-24 23:11:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 186 states have internal predecessors, (252), 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) [2024-09-24 23:11:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2024-09-24 23:11:17,592 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 44 [2024-09-24 23:11:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:17,593 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2024-09-24 23:11:17,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:17,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2024-09-24 23:11:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:11:17,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:17,594 INFO L216 NwaCegarLoop]: trace histogram [24, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:17,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-24 23:11:17,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-24 23:11:17,794 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:17,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1333110391, now seen corresponding path program 39 times [2024-09-24 23:11:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:17,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488909560] [2024-09-24 23:11:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:18,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488909560] [2024-09-24 23:11:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488909560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930835913] [2024-09-24 23:11:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:11:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:18,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:18,503 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) [2024-09-24 23:11:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-24 23:11:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-24 23:11:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:18,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-24 23:11:18,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:18,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930835913] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:20,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:20,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2024-09-24 23:11:20,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272619573] [2024-09-24 23:11:20,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:20,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-24 23:11:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-24 23:11:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=4116, Unknown=0, NotChecked=0, Total=4970 [2024-09-24 23:11:20,237 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 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) [2024-09-24 23:11:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:44,656 INFO L93 Difference]: Finished difference Result 392 states and 529 transitions. [2024-09-24 23:11:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-09-24 23:11:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 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 44 [2024-09-24 23:11:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:44,658 INFO L225 Difference]: With dead ends: 392 [2024-09-24 23:11:44,658 INFO L226 Difference]: Without dead ends: 387 [2024-09-24 23:11:44,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=2796, Invalid=14234, Unknown=0, NotChecked=0, Total=17030 [2024-09-24 23:11:44,659 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 404 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:44,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 611 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-24 23:11:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-09-24 23:11:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 198. [2024-09-24 23:11:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.3730569948186528) internal successors, (265), 193 states have internal predecessors, (265), 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) [2024-09-24 23:11:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 269 transitions. [2024-09-24 23:11:45,005 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 269 transitions. Word has length 44 [2024-09-24 23:11:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:45,006 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 269 transitions. [2024-09-24 23:11:45,006 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 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) [2024-09-24 23:11:45,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 269 transitions. [2024-09-24 23:11:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 23:11:45,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:45,007 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:45,020 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-24 23:11:45,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:45,208 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:45,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1252283532, now seen corresponding path program 40 times [2024-09-24 23:11:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081735968] [2024-09-24 23:11:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:45,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:45,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081735968] [2024-09-24 23:11:45,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081735968] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621888029] [2024-09-24 23:11:45,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:11:45,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:45,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:45,845 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) [2024-09-24 23:11:45,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-24 23:11:45,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:11:45,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:45,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-24 23:11:45,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:45,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:11:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621888029] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:47,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:47,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 72 [2024-09-24 23:11:47,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799227647] [2024-09-24 23:11:47,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:47,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-24 23:11:47,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-24 23:11:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4391, Unknown=0, NotChecked=0, Total=5112 [2024-09-24 23:11:47,455 INFO L87 Difference]: Start difference. First operand 198 states and 269 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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) [2024-09-24 23:12:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:14,720 INFO L93 Difference]: Finished difference Result 351 states and 467 transitions. [2024-09-24 23:12:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2024-09-24 23:12:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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 45 [2024-09-24 23:12:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:14,722 INFO L225 Difference]: With dead ends: 351 [2024-09-24 23:12:14,722 INFO L226 Difference]: Without dead ends: 327 [2024-09-24 23:12:14,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14273 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=8430, Invalid=47976, Unknown=0, NotChecked=0, Total=56406 [2024-09-24 23:12:14,726 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:14,726 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 374 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:12:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-09-24 23:12:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 208. [2024-09-24 23:12:15,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.3497536945812807) internal successors, (274), 203 states have internal predecessors, (274), 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) [2024-09-24 23:12:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 278 transitions. [2024-09-24 23:12:15,285 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 278 transitions. Word has length 45 [2024-09-24 23:12:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:15,285 INFO L474 AbstractCegarLoop]: Abstraction has 208 states and 278 transitions. [2024-09-24 23:12:15,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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) [2024-09-24 23:12:15,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 278 transitions. [2024-09-24 23:12:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-24 23:12:15,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:15,286 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:15,302 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-24 23:12:15,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:15,487 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:15,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2094064616, now seen corresponding path program 41 times [2024-09-24 23:12:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:15,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215332346] [2024-09-24 23:12:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:17,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215332346] [2024-09-24 23:12:17,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215332346] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118956298] [2024-09-24 23:12:17,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:12:17,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:17,008 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) [2024-09-24 23:12:17,009 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-24 23:12:17,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-24 23:12:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:12:17,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-24 23:12:17,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:17,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118956298] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:19,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:19,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 22, 22] total 77 [2024-09-24 23:12:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424034597] [2024-09-24 23:12:19,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:19,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-24 23:12:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-24 23:12:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5594, Unknown=0, NotChecked=0, Total=5852 [2024-09-24 23:12:19,511 INFO L87 Difference]: Start difference. First operand 208 states and 278 transitions. Second operand has 77 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 75 states have internal predecessors, (119), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)