./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:10:25,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:10:25,407 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:10:25,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:10:25,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:10:25,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:10:25,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:10:25,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:10:25,460 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:10:25,461 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:10:25,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:10:25,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:10:25,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:10:25,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:10:25,470 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:10:25,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:10:25,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:10:25,471 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:10:25,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:10:25,471 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:10:25,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:10:25,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:10:25,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:10:25,473 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:10:25,473 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:10:25,473 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:10:25,474 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:10:25,474 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:10:25,474 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:10:25,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:10:25,475 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:10:25,475 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:10:25,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:10:25,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:10:25,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:10:25,476 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:10:25,476 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:10:25,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:10:25,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:10:25,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:10:25,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:10:25,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:10:25,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:10:25,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:10:25,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:10:25,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:10:25,772 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:10:25,772 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:10:25,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-12 22:10:27,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:10:27,274 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:10:27,275 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-12 22:10:27,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/05453d331/aa59a15b41a44aefb4458e0051b8de5c/FLAGd4c827bb7 [2024-09-12 22:10:27,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/05453d331/aa59a15b41a44aefb4458e0051b8de5c [2024-09-12 22:10:27,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:10:27,302 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:10:27,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:10:27,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:10:27,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:10:27,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184ed5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27, skipping insertion in model container [2024-09-12 22:10:27,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,340 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:10:27,496 WARN L247 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-de52.c[368,381] [2024-09-12 22:10:27,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:10:27,524 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:10:27,532 WARN L247 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-de52.c[368,381] [2024-09-12 22:10:27,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:10:27,549 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:10:27,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27 WrapperNode [2024-09-12 22:10:27,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:10:27,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:10:27,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:10:27,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:10:27,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,564 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,569 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:10:27,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:10:27,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:10:27,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:10:27,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:10:27,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,581 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,598 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]. [2024-09-12 22:10:27,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:10:27,620 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:10:27,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:10:27,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:10:27,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (1/1) ... [2024-09-12 22:10:27,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:10:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:27,651 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) [2024-09-12 22:10:27,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:10:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:10:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:10:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:10:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:10:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:10:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:10:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:10:27,745 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:10:27,746 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:10:27,874 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 22:10:27,874 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:10:27,893 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:10:27,894 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-12 22:10:27,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:10:27 BoogieIcfgContainer [2024-09-12 22:10:27,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:10:27,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:10:27,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:10:27,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:10:27,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:10:27" (1/3) ... [2024-09-12 22:10:27,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6593a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:10:27, skipping insertion in model container [2024-09-12 22:10:27,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:10:27" (2/3) ... [2024-09-12 22:10:27,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6593a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:10:27, skipping insertion in model container [2024-09-12 22:10:27,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:10:27" (3/3) ... [2024-09-12 22:10:27,902 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-12 22:10:27,917 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:10:27,917 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:10:27,959 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:10:27,964 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;@2092ed56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:10:27,964 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:10:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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) [2024-09-12 22:10:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:10:27,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:27,980 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:27,980 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:27,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-12 22:10:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:27,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073159866] [2024-09-12 22:10:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:27,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073159866] [2024-09-12 22:10:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073159866] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:10:28,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:10:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:10:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423623545] [2024-09-12 22:10:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:28,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:10:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:10:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:10:28,202 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:28,236 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-12 22:10:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:10:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 [2024-09-12 22:10:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:28,244 INFO L225 Difference]: With dead ends: 38 [2024-09-12 22:10:28,244 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 22:10:28,247 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 [2024-09-12 22:10:28,252 INFO L434 NwaCegarLoop]: 24 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, 24 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 [2024-09-12 22:10:28,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 22:10:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 22:10:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-12 22:10:28,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-12 22:10:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:28,289 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-12 22:10:28,289 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-12 22:10:28,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-12 22:10:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:10:28,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:28,291 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:28,291 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:10:28,291 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:28,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-12 22:10:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551445591] [2024-09-12 22:10:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:28,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551445591] [2024-09-12 22:10:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551445591] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:10:28,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:10:28,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 22:10:28,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171923362] [2024-09-12 22:10:28,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:28,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:10:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:10:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:10:28,540 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-12 22:10:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:28,601 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-12 22:10:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 22:10:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 [2024-09-12 22:10:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:28,604 INFO L225 Difference]: With dead ends: 33 [2024-09-12 22:10:28,605 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 22:10:28,605 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 [2024-09-12 22:10:28,606 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:28,607 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 22:10:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 22:10:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2024-09-12 22:10:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-09-12 22:10:28,621 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2024-09-12 22:10:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:28,622 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-09-12 22:10:28,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-12 22:10:28,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-09-12 22:10:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:10:28,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:28,624 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:28,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:10:28,625 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:28,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-12 22:10:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:28,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610560256] [2024-09-12 22:10:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:28,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610560256] [2024-09-12 22:10:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610560256] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:10:28,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:10:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:10:28,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161117489] [2024-09-12 22:10:28,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:28,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:10:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:10:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:10:28,737 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-12 22:10:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:28,775 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-12 22:10:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:10:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2024-09-12 22:10:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:28,777 INFO L225 Difference]: With dead ends: 34 [2024-09-12 22:10:28,777 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 22:10:28,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:10:28,779 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:28,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 22:10:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-12 22:10:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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) [2024-09-12 22:10:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-09-12 22:10:28,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2024-09-12 22:10:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:28,798 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-09-12 22:10:28,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-12 22:10:28,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-09-12 22:10:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:10:28,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:28,800 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:28,800 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:10:28,800 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-12 22:10:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266102328] [2024-09-12 22:10:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266102328] [2024-09-12 22:10:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266102328] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:10:28,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:10:28,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:10:28,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284932051] [2024-09-12 22:10:28,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:28,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:10:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:10:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:10:28,875 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-12 22:10:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:28,911 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-12 22:10:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:10:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2024-09-12 22:10:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:28,913 INFO L225 Difference]: With dead ends: 40 [2024-09-12 22:10:28,914 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 22:10:28,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:10:28,916 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:28,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 22:10:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 22:10:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-09-12 22:10:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-09-12 22:10:28,935 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2024-09-12 22:10:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:28,937 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-09-12 22:10:28,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-12 22:10:28,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-09-12 22:10:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:10:28,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:28,941 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:28,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 22:10:28,941 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1994481964, now seen corresponding path program 1 times [2024-09-12 22:10:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:28,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781254820] [2024-09-12 22:10:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:29,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781254820] [2024-09-12 22:10:29,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781254820] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:10:29,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:10:29,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:10:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689851487] [2024-09-12 22:10:29,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:29,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:10:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:10:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:10:29,027 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-12 22:10:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:29,077 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-12 22:10:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:10:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 [2024-09-12 22:10:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:29,079 INFO L225 Difference]: With dead ends: 39 [2024-09-12 22:10:29,079 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 22:10:29,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:10:29,080 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:29,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 22:10:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-12 22:10:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2024-09-12 22:10:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-12 22:10:29,094 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2024-09-12 22:10:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:29,095 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-12 22:10:29,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-12 22:10:29,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-12 22:10:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:10:29,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:29,098 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:29,098 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 22:10:29,098 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:29,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312256, now seen corresponding path program 1 times [2024-09-12 22:10:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:29,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261941259] [2024-09-12 22:10:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261941259] [2024-09-12 22:10:29,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261941259] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766642953] [2024-09-12 22:10:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:29,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:29,233 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) [2024-09-12 22:10:29,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:10:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:10:29,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:29,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766642953] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:29,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-12 22:10:29,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-12 22:10:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728355192] [2024-09-12 22:10:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:29,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:10:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:10:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:10:29,391 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-12 22:10:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:29,427 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-12 22:10:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:10:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2024-09-12 22:10:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:29,428 INFO L225 Difference]: With dead ends: 34 [2024-09-12 22:10:29,428 INFO L226 Difference]: Without dead ends: 24 [2024-09-12 22:10:29,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:10:29,430 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:29,431 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-12 22:10:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-12 22:10:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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) [2024-09-12 22:10:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-09-12 22:10:29,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2024-09-12 22:10:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:29,441 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-09-12 22:10:29,441 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-12 22:10:29,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-09-12 22:10:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:10:29,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:29,442 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:29,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:29,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 22:10:29,647 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:29,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1896560672, now seen corresponding path program 1 times [2024-09-12 22:10:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:29,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156458979] [2024-09-12 22:10:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:29,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:29,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156458979] [2024-09-12 22:10:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156458979] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048045386] [2024-09-12 22:10:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:29,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:29,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:29,743 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) [2024-09-12 22:10:29,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:10:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:10:29,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:29,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048045386] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:29,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-12 22:10:29,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-12 22:10:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671825988] [2024-09-12 22:10:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:10:29,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:10:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:10:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:10:29,862 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-12 22:10:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:29,881 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-12 22:10:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:10:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2024-09-12 22:10:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:29,882 INFO L225 Difference]: With dead ends: 29 [2024-09-12 22:10:29,882 INFO L226 Difference]: Without dead ends: 21 [2024-09-12 22:10:29,882 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:10:29,883 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 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 [2024-09-12 22:10:29,883 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-12 22:10:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-12 22:10:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-12 22:10:29,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2024-09-12 22:10:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:29,888 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-12 22:10:29,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-12 22:10:29,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-12 22:10:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:10:29,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:29,890 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:29,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:10:30,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:10:30,094 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:30,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash -399434628, now seen corresponding path program 1 times [2024-09-12 22:10:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:30,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117274695] [2024-09-12 22:10:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:30,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117274695] [2024-09-12 22:10:30,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117274695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574873641] [2024-09-12 22:10:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:30,209 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) [2024-09-12 22:10:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:10:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:10:30,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:30,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574873641] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:30,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:30,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 22:10:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158096138] [2024-09-12 22:10:30,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:30,345 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:10:30,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:10:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:10:30,346 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-12 22:10:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:30,668 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2024-09-12 22:10:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:10:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 [2024-09-12 22:10:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:30,671 INFO L225 Difference]: With dead ends: 77 [2024-09-12 22:10:30,671 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 22:10:30,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-09-12 22:10:30,672 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:30,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:10:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 22:10:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 32. [2024-09-12 22:10:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2024-09-12 22:10:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-12 22:10:30,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-09-12 22:10:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:30,687 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-12 22:10:30,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-12 22:10:30,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-12 22:10:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:10:30,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:30,689 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:30,705 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:30,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 22:10:30,893 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-12 22:10:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948346653] [2024-09-12 22:10:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:10:30,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:30,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948346653] [2024-09-12 22:10:30,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948346653] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59553442] [2024-09-12 22:10:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:30,960 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) [2024-09-12 22:10:30,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:10:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:30,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:10:30,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:10:31,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:10:31,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59553442] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:31,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:31,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-12 22:10:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142936493] [2024-09-12 22:10:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:31,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:10:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:10:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:10:31,070 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-09-12 22:10:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:31,126 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-09-12 22:10:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:10:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 19 [2024-09-12 22:10:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:31,128 INFO L225 Difference]: With dead ends: 66 [2024-09-12 22:10:31,128 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 22:10:31,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:10:31,132 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:31,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 22:10:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-12 22:10:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 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) [2024-09-12 22:10:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-09-12 22:10:31,156 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2024-09-12 22:10:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:31,156 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-09-12 22:10:31,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-09-12 22:10:31,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-09-12 22:10:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:10:31,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:31,158 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:31,170 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:31,358 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:31,358 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-12 22:10:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902223737] [2024-09-12 22:10:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:31,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:31,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902223737] [2024-09-12 22:10:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902223737] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97978877] [2024-09-12 22:10:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:31,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:31,501 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) [2024-09-12 22:10:31,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:10:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:31,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:10:31,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:31,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97978877] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-09-12 22:10:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432975716] [2024-09-12 22:10:31,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:31,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:10:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:10:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:10:31,674 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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) [2024-09-12 22:10:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:31,748 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-12 22:10:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:10:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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 [2024-09-12 22:10:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:31,749 INFO L225 Difference]: With dead ends: 62 [2024-09-12 22:10:31,749 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 22:10:31,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:10:31,750 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:31,750 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 22:10:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-09-12 22:10:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 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) [2024-09-12 22:10:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-09-12 22:10:31,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 20 [2024-09-12 22:10:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:31,775 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-09-12 22:10:31,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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) [2024-09-12 22:10:31,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-09-12 22:10:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 22:10:31,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:31,779 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:31,794 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 22:10:31,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:10:31,983 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:31,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 2 times [2024-09-12 22:10:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628021607] [2024-09-12 22:10:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:32,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:32,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:32,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628021607] [2024-09-12 22:10:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628021607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:32,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293725297] [2024-09-12 22:10:32,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:32,082 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) [2024-09-12 22:10:32,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:10:32,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:32,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:10:32,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:32,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293725297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:32,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-12 22:10:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541595454] [2024-09-12 22:10:32,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:32,237 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:10:32,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:10:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:10:32,238 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-09-12 22:10:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:32,409 INFO L93 Difference]: Finished difference Result 96 states and 141 transitions. [2024-09-12 22:10:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:10:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2024-09-12 22:10:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:32,411 INFO L225 Difference]: With dead ends: 96 [2024-09-12 22:10:32,411 INFO L226 Difference]: Without dead ends: 68 [2024-09-12 22:10:32,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:10:32,412 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:32,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 103 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:10:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-12 22:10:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-09-12 22:10:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2024-09-12 22:10:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-12 22:10:32,434 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-09-12 22:10:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:32,435 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-12 22:10:32,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-09-12 22:10:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-12 22:10:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:10:32,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:32,436 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:32,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:10:32,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:10:32,641 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:32,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1383500575, now seen corresponding path program 3 times [2024-09-12 22:10:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648459212] [2024-09-12 22:10:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:32,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648459212] [2024-09-12 22:10:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648459212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861014929] [2024-09-12 22:10:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:10:32,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:32,772 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) [2024-09-12 22:10:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:10:32,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:10:32,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:32,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:10:32,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:32,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861014929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:32,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:32,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-12 22:10:32,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552465953] [2024-09-12 22:10:32,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:32,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:10:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:10:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:10:32,952 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-12 22:10:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:33,297 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2024-09-12 22:10:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:10:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 22 [2024-09-12 22:10:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:33,299 INFO L225 Difference]: With dead ends: 84 [2024-09-12 22:10:33,299 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 22:10:33,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:10:33,300 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:33,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:10:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 22:10:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-12 22:10:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 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) [2024-09-12 22:10:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-12 22:10:33,323 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2024-09-12 22:10:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:33,323 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-12 22:10:33,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-12 22:10:33,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-12 22:10:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:10:33,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:33,324 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:33,342 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:10:33,524 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:33,525 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1003223996, now seen corresponding path program 2 times [2024-09-12 22:10:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:33,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940127376] [2024-09-12 22:10:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:33,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:10:33,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:33,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940127376] [2024-09-12 22:10:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940127376] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023214580] [2024-09-12 22:10:33,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:33,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:33,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:33,655 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) [2024-09-12 22:10:33,656 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:10:33,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:33,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:10:33,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:33,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:10:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023214580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:34,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2024-09-12 22:10:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892742901] [2024-09-12 22:10:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:34,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:10:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:10:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:10:34,011 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:34,762 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2024-09-12 22:10:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 22:10:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-12 22:10:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:34,764 INFO L225 Difference]: With dead ends: 147 [2024-09-12 22:10:34,764 INFO L226 Difference]: Without dead ends: 108 [2024-09-12 22:10:34,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:10:34,765 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:34,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 252 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:10:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-12 22:10:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2024-09-12 22:10:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.369047619047619) internal successors, (115), 84 states have internal predecessors, (115), 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) [2024-09-12 22:10:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2024-09-12 22:10:34,802 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 23 [2024-09-12 22:10:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:34,803 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2024-09-12 22:10:34,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:34,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2024-09-12 22:10:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:10:34,805 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:34,805 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:34,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 22:10:35,006 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:35,006 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:35,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 411216348, now seen corresponding path program 4 times [2024-09-12 22:10:35,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:35,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049045053] [2024-09-12 22:10:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:35,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049045053] [2024-09-12 22:10:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049045053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225636924] [2024-09-12 22:10:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:10:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:35,194 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) [2024-09-12 22:10:35,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:10:35,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:10:35,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:35,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:10:35,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:10:35,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:10:35,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225636924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:35,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:35,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-12 22:10:35,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514307994] [2024-09-12 22:10:35,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:35,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:10:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:35,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:10:35,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:10:35,427 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-09-12 22:10:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:36,321 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-12 22:10:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-12 22:10:36,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 25 [2024-09-12 22:10:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:36,323 INFO L225 Difference]: With dead ends: 123 [2024-09-12 22:10:36,323 INFO L226 Difference]: Without dead ends: 96 [2024-09-12 22:10:36,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 22:10:36,324 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:36,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:10:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-12 22:10:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-09-12 22:10:36,350 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) [2024-09-12 22:10:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-12 22:10:36,350 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 25 [2024-09-12 22:10:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:36,351 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-12 22:10:36,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-09-12 22:10:36,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-12 22:10:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:10:36,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:36,352 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:36,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 22:10:36,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 22:10:36,557 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:36,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1940516302, now seen corresponding path program 3 times [2024-09-12 22:10:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:36,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557855236] [2024-09-12 22:10:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:36,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:10:36,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:36,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557855236] [2024-09-12 22:10:36,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557855236] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:36,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022981127] [2024-09-12 22:10:36,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:10:36,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:36,674 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) [2024-09-12 22:10:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:10:36,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:10:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:36,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 22:10:36,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:36,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:10:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022981127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:37,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:37,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 24 [2024-09-12 22:10:37,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298083474] [2024-09-12 22:10:37,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:37,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:10:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:10:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:10:37,063 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:38,063 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2024-09-12 22:10:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-12 22:10:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-12 22:10:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:38,064 INFO L225 Difference]: With dead ends: 171 [2024-09-12 22:10:38,064 INFO L226 Difference]: Without dead ends: 134 [2024-09-12 22:10:38,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 22:10:38,066 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:38,066 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 246 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:10:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-12 22:10:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2024-09-12 22:10:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 96 states have internal predecessors, (131), 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) [2024-09-12 22:10:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-12 22:10:38,098 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2024-09-12 22:10:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:38,098 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-12 22:10:38,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:38,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-12 22:10:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:10:38,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:38,099 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:38,111 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:10:38,302 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:10:38,302 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:38,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash 712565185, now seen corresponding path program 4 times [2024-09-12 22:10:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:38,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067646769] [2024-09-12 22:10:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:38,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:10:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067646769] [2024-09-12 22:10:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067646769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233152760] [2024-09-12 22:10:38,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:10:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:38,413 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) [2024-09-12 22:10:38,415 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:10:38,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:10:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:38,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:10:38,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:10:38,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:10:38,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233152760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:38,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:38,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-12 22:10:38,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961590745] [2024-09-12 22:10:38,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:38,536 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:10:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:10:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:10:38,538 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-09-12 22:10:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:38,597 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2024-09-12 22:10:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 22:10:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:10:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:38,599 INFO L225 Difference]: With dead ends: 125 [2024-09-12 22:10:38,599 INFO L226 Difference]: Without dead ends: 99 [2024-09-12 22:10:38,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:10:38,600 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:38,601 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-12 22:10:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-12 22:10:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.372340425531915) internal successors, (129), 94 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) [2024-09-12 22:10:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2024-09-12 22:10:38,633 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 26 [2024-09-12 22:10:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:38,633 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2024-09-12 22:10:38,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-09-12 22:10:38,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2024-09-12 22:10:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:10:38,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:38,634 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:38,652 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 22:10:38,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:10:38,835 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:38,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash -133051136, now seen corresponding path program 5 times [2024-09-12 22:10:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:38,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418592392] [2024-09-12 22:10:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:38,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:10:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418592392] [2024-09-12 22:10:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418592392] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037796167] [2024-09-12 22:10:38,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:10:38,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:38,957 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) [2024-09-12 22:10:38,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:10:39,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:10:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:39,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:10:39,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:10:39,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 22:10:39,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037796167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:39,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:39,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-12 22:10:39,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055098635] [2024-09-12 22:10:39,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:39,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 22:10:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 22:10:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-12 22:10:39,139 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2024-09-12 22:10:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:39,420 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2024-09-12 22:10:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 22:10:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 26 [2024-09-12 22:10:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:39,422 INFO L225 Difference]: With dead ends: 216 [2024-09-12 22:10:39,422 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 22:10:39,422 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:10:39,423 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:39,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 268 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:10:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 22:10:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2024-09-12 22:10:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 108 states have internal predecessors, (141), 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) [2024-09-12 22:10:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-09-12 22:10:39,459 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 26 [2024-09-12 22:10:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:39,460 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-09-12 22:10:39,460 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2024-09-12 22:10:39,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-09-12 22:10:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:10:39,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:39,461 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:39,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:39,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:10:39,662 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1263484460, now seen corresponding path program 5 times [2024-09-12 22:10:39,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:39,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972660497] [2024-09-12 22:10:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:39,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:10:39,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972660497] [2024-09-12 22:10:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972660497] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129652666] [2024-09-12 22:10:39,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:10:39,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:39,806 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) [2024-09-12 22:10:39,810 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:10:39,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:10:39,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:39,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:10:39,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:39,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 22:10:40,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129652666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:40,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:40,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 5] total 21 [2024-09-12 22:10:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227193668] [2024-09-12 22:10:40,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:40,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:10:40,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:10:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:10:40,041 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:40,805 INFO L93 Difference]: Finished difference Result 229 states and 321 transitions. [2024-09-12 22:10:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 22:10:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-12 22:10:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:40,807 INFO L225 Difference]: With dead ends: 229 [2024-09-12 22:10:40,807 INFO L226 Difference]: Without dead ends: 204 [2024-09-12 22:10:40,808 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 22:10:40,808 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:40,809 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-09-12 22:10:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-09-12 22:10:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.3203125) internal successors, (169), 128 states have internal predecessors, (169), 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) [2024-09-12 22:10:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2024-09-12 22:10:40,850 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 27 [2024-09-12 22:10:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:40,850 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2024-09-12 22:10:40,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:40,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2024-09-12 22:10:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 22:10:40,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:40,851 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:40,867 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:41,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 22:10:41,052 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:41,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -695293183, now seen corresponding path program 6 times [2024-09-12 22:10:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:41,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616332225] [2024-09-12 22:10:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:41,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:41,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:41,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616332225] [2024-09-12 22:10:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616332225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143111036] [2024-09-12 22:10:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:10:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:41,234 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) [2024-09-12 22:10:41,235 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 22:10:41,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:10:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:41,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:10:41,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 22:10:41,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 22:10:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143111036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-12 22:10:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347651575] [2024-09-12 22:10:41,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:41,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:10:41,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:10:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:10:41,568 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2024-09-12 22:10:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:42,815 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2024-09-12 22:10:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-12 22:10:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 [2024-09-12 22:10:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:42,816 INFO L225 Difference]: With dead ends: 200 [2024-09-12 22:10:42,816 INFO L226 Difference]: Without dead ends: 170 [2024-09-12 22:10:42,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=440, Invalid=4962, Unknown=0, NotChecked=0, Total=5402 [2024-09-12 22:10:42,822 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:42,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 168 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-12 22:10:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-09-12 22:10:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 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) [2024-09-12 22:10:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2024-09-12 22:10:42,869 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 28 [2024-09-12 22:10:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:42,869 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2024-09-12 22:10:42,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2024-09-12 22:10:42,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2024-09-12 22:10:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 22:10:42,870 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:42,870 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:42,887 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 22:10:43,074 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:43,075 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:43,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:43,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2037353101, now seen corresponding path program 6 times [2024-09-12 22:10:43,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:43,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731620619] [2024-09-12 22:10:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:43,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731620619] [2024-09-12 22:10:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731620619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012631742] [2024-09-12 22:10:43,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:10:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:43,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:43,181 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) [2024-09-12 22:10:43,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 22:10:43,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:10:43,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:43,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:10:43,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:43,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012631742] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:43,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:43,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-12 22:10:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088986576] [2024-09-12 22:10:43,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:43,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:10:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:10:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:10:43,324 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-12 22:10:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:43,435 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-09-12 22:10:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:10:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 29 [2024-09-12 22:10:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:43,436 INFO L225 Difference]: With dead ends: 165 [2024-09-12 22:10:43,436 INFO L226 Difference]: Without dead ends: 151 [2024-09-12 22:10:43,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:10:43,437 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:43,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-12 22:10:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-12 22:10:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 146 states have internal predecessors, (188), 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) [2024-09-12 22:10:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-09-12 22:10:43,508 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 29 [2024-09-12 22:10:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:43,510 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-09-12 22:10:43,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-12 22:10:43,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-09-12 22:10:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 22:10:43,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:43,511 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:43,527 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:43,712 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:43,712 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:43,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash 947704670, now seen corresponding path program 7 times [2024-09-12 22:10:43,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:43,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727577790] [2024-09-12 22:10:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:43,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:43,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:10:43,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727577790] [2024-09-12 22:10:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727577790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099857562] [2024-09-12 22:10:43,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:10:43,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:43,894 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) [2024-09-12 22:10:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 22:10:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:43,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 22:10:43,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:10:44,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:10:44,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099857562] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:44,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:44,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 8] total 23 [2024-09-12 22:10:44,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774611749] [2024-09-12 22:10:44,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:44,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 22:10:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 22:10:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:10:44,136 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2024-09-12 22:10:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:45,263 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2024-09-12 22:10:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-12 22:10:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 [2024-09-12 22:10:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:45,267 INFO L225 Difference]: With dead ends: 302 [2024-09-12 22:10:45,267 INFO L226 Difference]: Without dead ends: 254 [2024-09-12 22:10:45,268 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 22:10:45,269 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:45,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 481 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-12 22:10:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2024-09-12 22:10:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 150 states have internal predecessors, (193), 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) [2024-09-12 22:10:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-09-12 22:10:45,325 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 29 [2024-09-12 22:10:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:45,325 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-09-12 22:10:45,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2024-09-12 22:10:45,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-09-12 22:10:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:10:45,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:45,327 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:45,340 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:45,527 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:45,527 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:45,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1065772992, now seen corresponding path program 2 times [2024-09-12 22:10:45,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:45,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892204190] [2024-09-12 22:10:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:45,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:45,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:10:45,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:45,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892204190] [2024-09-12 22:10:45,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892204190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:45,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004126227] [2024-09-12 22:10:45,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:45,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:45,677 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) [2024-09-12 22:10:45,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 22:10:45,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:45,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:10:45,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-12 22:10:45,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-12 22:10:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004126227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:46,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-12 22:10:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438779710] [2024-09-12 22:10:46,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:46,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:10:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:10:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:10:46,008 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2024-09-12 22:10:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:46,920 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2024-09-12 22:10:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 22:10:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 30 [2024-09-12 22:10:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:46,922 INFO L225 Difference]: With dead ends: 231 [2024-09-12 22:10:46,922 INFO L226 Difference]: Without dead ends: 197 [2024-09-12 22:10:46,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 22:10:46,924 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:46,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:10:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-12 22:10:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-09-12 22:10:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 144 states have internal predecessors, (182), 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) [2024-09-12 22:10:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-09-12 22:10:46,982 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 30 [2024-09-12 22:10:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:46,982 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-09-12 22:10:46,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2024-09-12 22:10:46,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-09-12 22:10:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:10:46,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:46,984 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:46,996 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:47,184 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:47,184 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:47,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash -850750864, now seen corresponding path program 8 times [2024-09-12 22:10:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:47,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447358442] [2024-09-12 22:10:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:47,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:10:47,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:47,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447358442] [2024-09-12 22:10:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447358442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:47,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324401921] [2024-09-12 22:10:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:47,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:47,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:47,349 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) [2024-09-12 22:10:47,352 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 22:10:47,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:47,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:47,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 22:10:47,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:47,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:10:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324401921] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:47,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 30 [2024-09-12 22:10:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959214460] [2024-09-12 22:10:47,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:47,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:10:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:10:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:10:47,810 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:49,778 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2024-09-12 22:10:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-12 22:10:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:10:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:49,780 INFO L225 Difference]: With dead ends: 324 [2024-09-12 22:10:49,780 INFO L226 Difference]: Without dead ends: 249 [2024-09-12 22:10:49,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2024-09-12 22:10:49,782 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:49,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 596 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:10:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-12 22:10:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 171. [2024-09-12 22:10:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 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) [2024-09-12 22:10:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2024-09-12 22:10:49,838 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 30 [2024-09-12 22:10:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:49,838 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2024-09-12 22:10:49,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:49,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2024-09-12 22:10:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:10:49,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:49,839 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:49,851 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 22:10:50,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 22:10:50,039 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:50,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 9 times [2024-09-12 22:10:50,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:50,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690488020] [2024-09-12 22:10:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:50,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:10:50,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:50,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690488020] [2024-09-12 22:10:50,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690488020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:50,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597220911] [2024-09-12 22:10:50,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:10:50,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:50,145 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) [2024-09-12 22:10:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 22:10:50,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:10:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:50,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:10:50,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:10:50,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:10:50,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597220911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:50,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:50,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-12 22:10:50,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110111415] [2024-09-12 22:10:50,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:50,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:10:50,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:10:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:10:50,292 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-12 22:10:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:50,396 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2024-09-12 22:10:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:10:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 [2024-09-12 22:10:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:50,398 INFO L225 Difference]: With dead ends: 187 [2024-09-12 22:10:50,398 INFO L226 Difference]: Without dead ends: 159 [2024-09-12 22:10:50,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:10:50,399 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:50,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:10:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-12 22:10:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-12 22:10:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 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) [2024-09-12 22:10:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2024-09-12 22:10:50,471 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 31 [2024-09-12 22:10:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:50,471 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2024-09-12 22:10:50,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-12 22:10:50,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2024-09-12 22:10:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:10:50,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:50,472 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:50,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-12 22:10:50,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 22:10:50,676 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:50,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash -502026436, now seen corresponding path program 7 times [2024-09-12 22:10:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:50,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985444026] [2024-09-12 22:10:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:50,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:50,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:10:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985444026] [2024-09-12 22:10:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985444026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758858487] [2024-09-12 22:10:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:10:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:50,845 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) [2024-09-12 22:10:50,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 22:10:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:50,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:10:50,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:10:50,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:10:51,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758858487] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:51,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:51,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-09-12 22:10:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110646706] [2024-09-12 22:10:51,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:51,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 22:10:51,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 22:10:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:10:51,100 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2024-09-12 22:10:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:52,266 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2024-09-12 22:10:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-12 22:10:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 [2024-09-12 22:10:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:52,269 INFO L225 Difference]: With dead ends: 537 [2024-09-12 22:10:52,269 INFO L226 Difference]: Without dead ends: 485 [2024-09-12 22:10:52,270 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=967, Invalid=3863, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 22:10:52,271 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:52,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 405 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-09-12 22:10:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 235. [2024-09-12 22:10:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 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) [2024-09-12 22:10:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2024-09-12 22:10:52,361 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 31 [2024-09-12 22:10:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:52,361 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2024-09-12 22:10:52,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2024-09-12 22:10:52,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2024-09-12 22:10:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 22:10:52,362 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:52,362 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:52,376 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:52,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 22:10:52,563 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 10 times [2024-09-12 22:10:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068204892] [2024-09-12 22:10:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:52,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:10:52,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068204892] [2024-09-12 22:10:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068204892] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401069634] [2024-09-12 22:10:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:10:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:52,745 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) [2024-09-12 22:10:52,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 22:10:52,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:10:52,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:52,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:10:52,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:10:52,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:10:52,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401069634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:52,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:52,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-12 22:10:52,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417778631] [2024-09-12 22:10:52,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:52,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:10:52,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:10:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:10:52,918 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-12 22:10:57,196 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 [] [2024-09-12 22:10:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:57,310 INFO L93 Difference]: Finished difference Result 462 states and 718 transitions. [2024-09-12 22:10:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:10:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 [2024-09-12 22:10:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:57,313 INFO L225 Difference]: With dead ends: 462 [2024-09-12 22:10:57,313 INFO L226 Difference]: Without dead ends: 423 [2024-09-12 22:10:57,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:10:57,314 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:57,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-12 22:10:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-12 22:10:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2024-09-12 22:10:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.4695121951219512) internal successors, (482), 328 states have internal predecessors, (482), 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) [2024-09-12 22:10:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2024-09-12 22:10:57,492 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 33 [2024-09-12 22:10:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:57,493 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2024-09-12 22:10:57,493 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-12 22:10:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2024-09-12 22:10:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:10:57,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:57,495 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:57,513 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:57,695 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 22:10:57,696 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:57,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1047726976, now seen corresponding path program 11 times [2024-09-12 22:10:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:57,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749772258] [2024-09-12 22:10:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:57,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749772258] [2024-09-12 22:10:57,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749772258] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375379783] [2024-09-12 22:10:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:10:57,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:57,893 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) [2024-09-12 22:10:57,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 22:10:57,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 22:10:57,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:57,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 22:10:57,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:58,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 22:10:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375379783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:58,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 8] total 24 [2024-09-12 22:10:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272391676] [2024-09-12 22:10:58,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:58,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:10:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:10:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:10:58,170 INFO L87 Difference]: Start difference. First operand 333 states and 486 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-09-12 22:10:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:59,258 INFO L93 Difference]: Finished difference Result 676 states and 984 transitions. [2024-09-12 22:10:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 22:10:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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 34 [2024-09-12 22:10:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:59,261 INFO L225 Difference]: With dead ends: 676 [2024-09-12 22:10:59,261 INFO L226 Difference]: Without dead ends: 511 [2024-09-12 22:10:59,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 22:10:59,264 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:59,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 581 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-12 22:10:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 367. [2024-09-12 22:10:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.4116022099447514) internal successors, (511), 362 states have internal predecessors, (511), 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) [2024-09-12 22:10:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2024-09-12 22:10:59,428 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 34 [2024-09-12 22:10:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:59,428 INFO L474 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2024-09-12 22:10:59,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-09-12 22:10:59,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2024-09-12 22:10:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 22:10:59,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:59,430 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:59,447 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 22:10:59,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 22:10:59,630 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:59,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 513042476, now seen corresponding path program 12 times [2024-09-12 22:10:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:59,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364780211] [2024-09-12 22:10:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:59,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:10:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364780211] [2024-09-12 22:10:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364780211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943283822] [2024-09-12 22:10:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:10:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:59,844 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) [2024-09-12 22:10:59,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 22:10:59,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 22:10:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:59,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:10:59,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:11:00,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:11:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943283822] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:00,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 30 [2024-09-12 22:11:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811545576] [2024-09-12 22:11:00,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:00,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:11:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:11:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:11:00,243 INFO L87 Difference]: Start difference. First operand 367 states and 515 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:02,656 INFO L93 Difference]: Finished difference Result 742 states and 1046 transitions. [2024-09-12 22:11:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-12 22:11:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-12 22:11:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:02,659 INFO L225 Difference]: With dead ends: 742 [2024-09-12 22:11:02,659 INFO L226 Difference]: Without dead ends: 595 [2024-09-12 22:11:02,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1068, Invalid=6942, Unknown=0, NotChecked=0, Total=8010 [2024-09-12 22:11:02,669 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:02,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 686 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 22:11:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-09-12 22:11:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 383. [2024-09-12 22:11:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.3862433862433863) internal successors, (524), 378 states have internal predecessors, (524), 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) [2024-09-12 22:11:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 528 transitions. [2024-09-12 22:11:02,863 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 528 transitions. Word has length 35 [2024-09-12 22:11:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:02,863 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 528 transitions. [2024-09-12 22:11:02,863 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:02,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 528 transitions. [2024-09-12 22:11:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:11:02,864 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:02,864 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:03,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 22:11:03,065 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:03,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-12 22:11:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:03,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584151139] [2024-09-12 22:11:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:03,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 22:11:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584151139] [2024-09-12 22:11:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584151139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244372512] [2024-09-12 22:11:03,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:11:03,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:03,280 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) [2024-09-12 22:11:03,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 22:11:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:11:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:03,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:11:03,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:11:03,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:11:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244372512] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:03,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:03,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-12 22:11:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107759625] [2024-09-12 22:11:03,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:03,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:11:03,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:11:03,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:11:03,619 INFO L87 Difference]: Start difference. First operand 383 states and 528 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2024-09-12 22:11:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:05,712 INFO L93 Difference]: Finished difference Result 812 states and 1129 transitions. [2024-09-12 22:11:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-12 22:11:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 36 [2024-09-12 22:11:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:05,715 INFO L225 Difference]: With dead ends: 812 [2024-09-12 22:11:05,715 INFO L226 Difference]: Without dead ends: 735 [2024-09-12 22:11:05,717 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1589, Invalid=6243, Unknown=0, NotChecked=0, Total=7832 [2024-09-12 22:11:05,717 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:05,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 374 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:11:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-12 22:11:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 436. [2024-09-12 22:11:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.382830626450116) internal successors, (596), 431 states have internal predecessors, (596), 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) [2024-09-12 22:11:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 600 transitions. [2024-09-12 22:11:05,932 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 600 transitions. Word has length 36 [2024-09-12 22:11:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:05,932 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 600 transitions. [2024-09-12 22:11:05,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2024-09-12 22:11:05,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 600 transitions. [2024-09-12 22:11:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:11:05,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:05,934 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:05,950 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:06,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 22:11:06,135 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:06,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 13 times [2024-09-12 22:11:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:06,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094103972] [2024-09-12 22:11:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:06,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:06,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:11:06,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094103972] [2024-09-12 22:11:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094103972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8399917] [2024-09-12 22:11:06,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:11:06,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:06,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:06,448 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) [2024-09-12 22:11:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 22:11:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:06,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:11:06,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:11:06,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:11:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8399917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:06,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:06,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-12 22:11:06,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923559011] [2024-09-12 22:11:06,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:06,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:11:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:11:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:11:06,676 INFO L87 Difference]: Start difference. First operand 436 states and 600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 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) [2024-09-12 22:11:11,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:11:19,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:11:27,197 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 [] [2024-09-12 22:11:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:27,386 INFO L93 Difference]: Finished difference Result 629 states and 870 transitions. [2024-09-12 22:11:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 22:11:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:11:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:27,389 INFO L225 Difference]: With dead ends: 629 [2024-09-12 22:11:27,389 INFO L226 Difference]: Without dead ends: 611 [2024-09-12 22:11:27,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-09-12 22:11:27,390 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:27,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2024-09-12 22:11:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-09-12 22:11:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 476. [2024-09-12 22:11:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3736730360934182) internal successors, (647), 471 states have internal predecessors, (647), 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) [2024-09-12 22:11:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 651 transitions. [2024-09-12 22:11:27,632 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 651 transitions. Word has length 38 [2024-09-12 22:11:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:27,632 INFO L474 AbstractCegarLoop]: Abstraction has 476 states and 651 transitions. [2024-09-12 22:11:27,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 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) [2024-09-12 22:11:27,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 651 transitions. [2024-09-12 22:11:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:11:27,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:27,634 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:27,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:27,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:27,834 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:27,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1102958530, now seen corresponding path program 14 times [2024-09-12 22:11:27,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:27,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188257666] [2024-09-12 22:11:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:28,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:11:28,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188257666] [2024-09-12 22:11:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188257666] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889681109] [2024-09-12 22:11:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:11:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:28,087 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) [2024-09-12 22:11:28,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 22:11:28,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:11:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:28,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 22:11:28,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:11:28,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:11:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889681109] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:28,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 17] total 45 [2024-09-12 22:11:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667723449] [2024-09-12 22:11:28,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:28,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 22:11:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 22:11:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:11:28,783 INFO L87 Difference]: Start difference. First operand 476 states and 651 transitions. Second operand has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:32,516 INFO L93 Difference]: Finished difference Result 1019 states and 1392 transitions. [2024-09-12 22:11:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-12 22:11:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:11:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:32,520 INFO L225 Difference]: With dead ends: 1019 [2024-09-12 22:11:32,520 INFO L226 Difference]: Without dead ends: 779 [2024-09-12 22:11:32,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1601, Invalid=10389, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 22:11:32,522 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:32,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1304 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:11:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-09-12 22:11:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 468. [2024-09-12 22:11:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.408207343412527) internal successors, (652), 463 states have internal predecessors, (652), 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) [2024-09-12 22:11:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 656 transitions. [2024-09-12 22:11:32,874 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 656 transitions. Word has length 38 [2024-09-12 22:11:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:32,874 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 656 transitions. [2024-09-12 22:11:32,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 656 transitions. [2024-09-12 22:11:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 22:11:32,875 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:32,875 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:32,889 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:33,079 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:33,079 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:33,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821890, now seen corresponding path program 4 times [2024-09-12 22:11:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:33,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378183097] [2024-09-12 22:11:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:33,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:33,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:11:33,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378183097] [2024-09-12 22:11:33,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378183097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948804794] [2024-09-12 22:11:33,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:11:33,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:33,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:33,332 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) [2024-09-12 22:11:33,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 22:11:33,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:11:33,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:33,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 22:11:33,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 22:11:33,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 22:11:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948804794] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:33,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-09-12 22:11:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681879408] [2024-09-12 22:11:33,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:33,799 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 22:11:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 22:11:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 22:11:33,800 INFO L87 Difference]: Start difference. First operand 468 states and 656 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-12 22:11:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:37,548 INFO L93 Difference]: Finished difference Result 1176 states and 1620 transitions. [2024-09-12 22:11:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-12 22:11:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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 [2024-09-12 22:11:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:37,552 INFO L225 Difference]: With dead ends: 1176 [2024-09-12 22:11:37,552 INFO L226 Difference]: Without dead ends: 1076 [2024-09-12 22:11:37,554 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=10823, Unknown=0, NotChecked=0, Total=13340 [2024-09-12 22:11:37,554 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:37,555 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 542 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:11:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-09-12 22:11:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 537. [2024-09-12 22:11:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.3966165413533835) internal successors, (743), 532 states have internal predecessors, (743), 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) [2024-09-12 22:11:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2024-09-12 22:11:37,995 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 39 [2024-09-12 22:11:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:37,995 INFO L474 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2024-09-12 22:11:37,995 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-12 22:11:37,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2024-09-12 22:11:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:11:37,996 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:37,996 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:38,009 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:38,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:38,197 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:38,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1752322643, now seen corresponding path program 15 times [2024-09-12 22:11:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:38,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846003323] [2024-09-12 22:11:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:38,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:38,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:11:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846003323] [2024-09-12 22:11:38,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846003323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196572967] [2024-09-12 22:11:38,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:11:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:38,370 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) [2024-09-12 22:11:38,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 22:11:38,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:11:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:38,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 22:11:38,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:11:38,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:11:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196572967] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:38,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-12 22:11:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540683604] [2024-09-12 22:11:38,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:38,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 22:11:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 22:11:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:11:38,607 INFO L87 Difference]: Start difference. First operand 537 states and 747 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:39,075 INFO L93 Difference]: Finished difference Result 616 states and 847 transitions. [2024-09-12 22:11:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:11:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:11:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:39,078 INFO L225 Difference]: With dead ends: 616 [2024-09-12 22:11:39,078 INFO L226 Difference]: Without dead ends: 568 [2024-09-12 22:11:39,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:11:39,078 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:39,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:11:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-12 22:11:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 523. [2024-09-12 22:11:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.4054054054054055) internal successors, (728), 518 states have internal predecessors, (728), 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) [2024-09-12 22:11:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 732 transitions. [2024-09-12 22:11:39,452 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 732 transitions. Word has length 41 [2024-09-12 22:11:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:39,452 INFO L474 AbstractCegarLoop]: Abstraction has 523 states and 732 transitions. [2024-09-12 22:11:39,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 732 transitions. [2024-09-12 22:11:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:11:39,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:39,454 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:39,468 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:39,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 22:11:39,654 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:39,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash 846902028, now seen corresponding path program 16 times [2024-09-12 22:11:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469122190] [2024-09-12 22:11:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:39,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 22:11:39,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:39,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469122190] [2024-09-12 22:11:39,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469122190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:39,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258682499] [2024-09-12 22:11:39,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:11:39,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:39,986 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) [2024-09-12 22:11:39,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 22:11:40,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:11:40,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:40,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 22:11:40,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:11:40,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-12 22:11:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258682499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:40,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 32 [2024-09-12 22:11:40,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637511010] [2024-09-12 22:11:40,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:40,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:11:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:11:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:11:40,378 INFO L87 Difference]: Start difference. First operand 523 states and 732 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:41,926 INFO L93 Difference]: Finished difference Result 1216 states and 1685 transitions. [2024-09-12 22:11:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 22:11:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:11:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:41,930 INFO L225 Difference]: With dead ends: 1216 [2024-09-12 22:11:41,930 INFO L226 Difference]: Without dead ends: 972 [2024-09-12 22:11:41,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 22:11:41,931 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 205 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:41,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 753 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:11:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-09-12 22:11:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 584. [2024-09-12 22:11:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.3523316062176165) internal successors, (783), 579 states have internal predecessors, (783), 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) [2024-09-12 22:11:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 787 transitions. [2024-09-12 22:11:42,330 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 787 transitions. Word has length 41 [2024-09-12 22:11:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:42,330 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 787 transitions. [2024-09-12 22:11:42,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:42,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 787 transitions. [2024-09-12 22:11:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:11:42,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:42,331 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:42,346 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:42,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 22:11:42,532 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:42,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash 706640914, now seen corresponding path program 5 times [2024-09-12 22:11:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081418200] [2024-09-12 22:11:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:42,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:42,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:11:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:42,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081418200] [2024-09-12 22:11:42,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081418200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:42,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104302053] [2024-09-12 22:11:42,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:11:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:42,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:42,902 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) [2024-09-12 22:11:42,904 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 22:11:43,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 22:11:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:43,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:11:43,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:11:43,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:11:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104302053] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:43,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:43,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-12 22:11:43,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563897833] [2024-09-12 22:11:43,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:43,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:11:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:11:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:11:43,662 INFO L87 Difference]: Start difference. First operand 584 states and 787 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-12 22:11:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:49,691 INFO L93 Difference]: Finished difference Result 1001 states and 1353 transitions. [2024-09-12 22:11:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-12 22:11:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 42 [2024-09-12 22:11:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:49,694 INFO L225 Difference]: With dead ends: 1001 [2024-09-12 22:11:49,694 INFO L226 Difference]: Without dead ends: 893 [2024-09-12 22:11:49,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1557, Invalid=28199, Unknown=0, NotChecked=0, Total=29756 [2024-09-12 22:11:49,697 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:49,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 285 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-12 22:11:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2024-09-12 22:11:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 552. [2024-09-12 22:11:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.3345521023765996) internal successors, (730), 547 states have internal predecessors, (730), 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) [2024-09-12 22:11:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 734 transitions. [2024-09-12 22:11:50,096 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 734 transitions. Word has length 42 [2024-09-12 22:11:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:50,096 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 734 transitions. [2024-09-12 22:11:50,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-12 22:11:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 734 transitions. [2024-09-12 22:11:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 22:11:50,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:50,097 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:50,109 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-12 22:11:50,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 22:11:50,298 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:50,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1382511156, now seen corresponding path program 17 times [2024-09-12 22:11:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115839360] [2024-09-12 22:11:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:50,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:11:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115839360] [2024-09-12 22:11:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115839360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570707239] [2024-09-12 22:11:50,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:11:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:50,626 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) [2024-09-12 22:11:50,629 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 22:11:50,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:11:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:50,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:11:50,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 22:11:50,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 22:11:50,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570707239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:50,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-12 22:11:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288045111] [2024-09-12 22:11:50,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:50,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:11:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:11:50,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:11:50,955 INFO L87 Difference]: Start difference. First operand 552 states and 734 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:55,341 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 [] [2024-09-12 22:12:03,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:12:11,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:12:19,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:12:23,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:12:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:24,234 INFO L93 Difference]: Finished difference Result 891 states and 1231 transitions. [2024-09-12 22:12:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 22:12:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-12 22:12:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:24,237 INFO L225 Difference]: With dead ends: 891 [2024-09-12 22:12:24,237 INFO L226 Difference]: Without dead ends: 860 [2024-09-12 22:12:24,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=344, Invalid=1293, Unknown=3, NotChecked=0, Total=1640 [2024-09-12 22:12:24,238 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:24,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-12 22:12:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-09-12 22:12:24,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 690. [2024-09-12 22:12:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 685 states have (on average 1.3620437956204379) internal successors, (933), 685 states have internal predecessors, (933), 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) [2024-09-12 22:12:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 937 transitions. [2024-09-12 22:12:24,797 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 937 transitions. Word has length 43 [2024-09-12 22:12:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:24,797 INFO L474 AbstractCegarLoop]: Abstraction has 690 states and 937 transitions. [2024-09-12 22:12:24,797 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:24,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 937 transitions. [2024-09-12 22:12:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 22:12:24,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:24,799 INFO L216 NwaCegarLoop]: trace histogram [13, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:24,816 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-12 22:12:24,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 22:12:25,000 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:25,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash 764816386, now seen corresponding path program 18 times [2024-09-12 22:12:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:25,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096506441] [2024-09-12 22:12:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:25,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:12:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096506441] [2024-09-12 22:12:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096506441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844963407] [2024-09-12 22:12:25,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:12:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:25,311 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) [2024-09-12 22:12:25,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 22:12:25,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 22:12:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:25,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:12:25,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-12 22:12:25,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-12 22:12:25,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844963407] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:25,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:25,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2024-09-12 22:12:25,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101282133] [2024-09-12 22:12:25,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:25,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:12:25,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:25,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:12:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:12:25,835 INFO L87 Difference]: Start difference. First operand 690 states and 937 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:30,057 INFO L93 Difference]: Finished difference Result 1431 states and 1953 transitions. [2024-09-12 22:12:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-09-12 22:12:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-12 22:12:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:30,060 INFO L225 Difference]: With dead ends: 1431 [2024-09-12 22:12:30,060 INFO L226 Difference]: Without dead ends: 1020 [2024-09-12 22:12:30,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 22:12:30,062 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:30,062 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1186 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:12:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-09-12 22:12:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 633. [2024-09-12 22:12:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 628 states have (on average 1.372611464968153) internal successors, (862), 628 states have internal predecessors, (862), 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) [2024-09-12 22:12:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 866 transitions. [2024-09-12 22:12:30,571 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 866 transitions. Word has length 44 [2024-09-12 22:12:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:30,571 INFO L474 AbstractCegarLoop]: Abstraction has 633 states and 866 transitions. [2024-09-12 22:12:30,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:30,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 866 transitions. [2024-09-12 22:12:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 22:12:30,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:30,572 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:30,587 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:30,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 22:12:30,773 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:30,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1388997645, now seen corresponding path program 6 times [2024-09-12 22:12:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766153221] [2024-09-12 22:12:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:31,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:31,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:31,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766153221] [2024-09-12 22:12:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766153221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580395069] [2024-09-12 22:12:31,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:12:31,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:31,187 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) [2024-09-12 22:12:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 22:12:31,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-12 22:12:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:31,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 22:12:31,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:12:31,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:12:32,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580395069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:32,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:32,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-12 22:12:32,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191901754] [2024-09-12 22:12:32,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:32,111 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:12:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:12:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:12:32,112 INFO L87 Difference]: Start difference. First operand 633 states and 866 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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) [2024-09-12 22:12:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:42,431 INFO L93 Difference]: Finished difference Result 1095 states and 1487 transitions. [2024-09-12 22:12:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-09-12 22:12:42,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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 45 [2024-09-12 22:12:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:42,434 INFO L225 Difference]: With dead ends: 1095 [2024-09-12 22:12:42,434 INFO L226 Difference]: Without dead ends: 981 [2024-09-12 22:12:42,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18795 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2342, Invalid=48960, Unknown=0, NotChecked=0, Total=51302 [2024-09-12 22:12:42,437 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 5338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:42,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-12 22:12:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2024-09-12 22:12:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 653. [2024-09-12 22:12:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 648 states have (on average 1.3503086419753085) internal successors, (875), 648 states have internal predecessors, (875), 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) [2024-09-12 22:12:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 879 transitions. [2024-09-12 22:12:42,983 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 879 transitions. Word has length 45 [2024-09-12 22:12:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:42,983 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 879 transitions. [2024-09-12 22:12:42,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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) [2024-09-12 22:12:42,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 879 transitions. [2024-09-12 22:12:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 22:12:42,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:42,985 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:43,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-12 22:12:43,189 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 22:12:43,189 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:43,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2100972460, now seen corresponding path program 19 times [2024-09-12 22:12:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888516907] [2024-09-12 22:12:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:43,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:12:43,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888516907] [2024-09-12 22:12:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888516907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717264649] [2024-09-12 22:12:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:12:43,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:43,561 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) [2024-09-12 22:12:43,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 22:12:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:43,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-12 22:12:43,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:12:43,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-12 22:12:44,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717264649] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:44,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:44,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 14] total 39 [2024-09-12 22:12:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807690385] [2024-09-12 22:12:44,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:44,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 22:12:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 22:12:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:12:44,110 INFO L87 Difference]: Start difference. First operand 653 states and 879 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:49,373 INFO L93 Difference]: Finished difference Result 1398 states and 1905 transitions. [2024-09-12 22:12:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-09-12 22:12:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-12 22:12:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:49,377 INFO L225 Difference]: With dead ends: 1398 [2024-09-12 22:12:49,377 INFO L226 Difference]: Without dead ends: 1092 [2024-09-12 22:12:49,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1037, Invalid=15475, Unknown=0, NotChecked=0, Total=16512 [2024-09-12 22:12:49,379 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:49,380 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1664 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:12:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-09-12 22:12:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 683. [2024-09-12 22:12:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.37905604719764) internal successors, (935), 678 states have internal predecessors, (935), 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) [2024-09-12 22:12:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 939 transitions. [2024-09-12 22:12:50,030 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 939 transitions. Word has length 45 [2024-09-12 22:12:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:50,030 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 939 transitions. [2024-09-12 22:12:50,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 939 transitions. [2024-09-12 22:12:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:12:50,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:50,032 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:50,044 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:50,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 22:12:50,232 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:50,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 20 times [2024-09-12 22:12:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885218383] [2024-09-12 22:12:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:50,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:12:50,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:50,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885218383] [2024-09-12 22:12:50,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885218383] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:50,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212547246] [2024-09-12 22:12:50,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:50,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:50,435 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) [2024-09-12 22:12:50,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 22:12:50,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:50,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:50,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 22:12:50,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:12:50,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:12:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212547246] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:50,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:50,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-12 22:12:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194783820] [2024-09-12 22:12:50,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:50,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:12:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:12:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:12:50,672 INFO L87 Difference]: Start difference. First operand 683 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2024-09-12 22:12:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:51,417 INFO L93 Difference]: Finished difference Result 765 states and 1040 transitions. [2024-09-12 22:12:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:12:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:12:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:51,421 INFO L225 Difference]: With dead ends: 765 [2024-09-12 22:12:51,421 INFO L226 Difference]: Without dead ends: 715 [2024-09-12 22:12:51,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 17 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:12:51,422 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:51,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-09-12 22:12:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 667. [2024-09-12 22:12:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.3867069486404835) internal successors, (918), 662 states have internal predecessors, (918), 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) [2024-09-12 22:12:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 922 transitions. [2024-09-12 22:12:52,082 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 922 transitions. Word has length 46 [2024-09-12 22:12:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:52,083 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 922 transitions. [2024-09-12 22:12:52,083 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2024-09-12 22:12:52,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 922 transitions. [2024-09-12 22:12:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:12:52,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:52,084 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:52,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-12 22:12:52,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 22:12:52,285 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:52,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2051607266, now seen corresponding path program 21 times [2024-09-12 22:12:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315606744] [2024-09-12 22:12:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:52,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 22:12:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315606744] [2024-09-12 22:12:52,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315606744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714705338] [2024-09-12 22:12:52,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:52,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:52,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:52,693 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) [2024-09-12 22:12:52,694 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 22:12:52,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 22:12:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:52,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:12:52,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-12 22:12:53,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-12 22:12:53,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714705338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:53,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:53,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-12 22:12:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607860490] [2024-09-12 22:12:53,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:53,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:12:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:12:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:12:53,084 INFO L87 Difference]: Start difference. First operand 667 states and 922 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2024-09-12 22:12:57,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:05,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:13,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:21,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:29,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:34,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:38,538 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 [] [2024-09-12 22:13:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:39,025 INFO L93 Difference]: Finished difference Result 1029 states and 1507 transitions. [2024-09-12 22:13:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 22:13:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 48 [2024-09-12 22:13:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:39,030 INFO L225 Difference]: With dead ends: 1029 [2024-09-12 22:13:39,030 INFO L226 Difference]: Without dead ends: 992 [2024-09-12 22:13:39,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=447, Invalid=1805, Unknown=4, NotChecked=0, Total=2256 [2024-09-12 22:13:39,031 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 59 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:39,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-09-12 22:13:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2024-09-12 22:13:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 882. [2024-09-12 22:13:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 877 states have (on average 1.4378563283922463) internal successors, (1261), 877 states have internal predecessors, (1261), 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) [2024-09-12 22:13:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2024-09-12 22:13:39,917 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 48 [2024-09-12 22:13:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:39,917 INFO L474 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2024-09-12 22:13:39,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2024-09-12 22:13:39,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2024-09-12 22:13:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:13:39,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:39,919 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:39,931 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 22:13:40,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:40,119 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:40,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1035706990, now seen corresponding path program 22 times [2024-09-12 22:13:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881091063] [2024-09-12 22:13:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:40,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-12 22:13:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881091063] [2024-09-12 22:13:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881091063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588615584] [2024-09-12 22:13:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:40,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:40,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:40,467 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) [2024-09-12 22:13:40,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 22:13:40,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:40,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 22:13:40,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 22:13:40,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 22:13:41,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588615584] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:41,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:41,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-12 22:13:41,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301385826] [2024-09-12 22:13:41,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:41,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:13:41,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:41,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:13:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:13:41,395 INFO L87 Difference]: Start difference. First operand 882 states and 1265 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-12 22:13:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:48,968 INFO L93 Difference]: Finished difference Result 1260 states and 1741 transitions. [2024-09-12 22:13:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-12 22:13:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 48 [2024-09-12 22:13:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:48,973 INFO L225 Difference]: With dead ends: 1260 [2024-09-12 22:13:48,973 INFO L226 Difference]: Without dead ends: 1162 [2024-09-12 22:13:48,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1577, Invalid=16783, Unknown=0, NotChecked=0, Total=18360 [2024-09-12 22:13:48,974 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:48,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 664 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 22:13:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-12 22:13:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 834. [2024-09-12 22:13:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.4330518697225574) internal successors, (1188), 829 states have internal predecessors, (1188), 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) [2024-09-12 22:13:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1192 transitions. [2024-09-12 22:13:49,817 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1192 transitions. Word has length 48 [2024-09-12 22:13:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:49,817 INFO L474 AbstractCegarLoop]: Abstraction has 834 states and 1192 transitions. [2024-09-12 22:13:49,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-12 22:13:49,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1192 transitions. [2024-09-12 22:13:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:13:49,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:49,819 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:49,837 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-12 22:13:50,020 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:50,020 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:50,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -308673998, now seen corresponding path program 7 times [2024-09-12 22:13:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241099893] [2024-09-12 22:13:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:50,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:50,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241099893] [2024-09-12 22:13:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241099893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462178639] [2024-09-12 22:13:50,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:13:50,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:50,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:50,577 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) [2024-09-12 22:13:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 22:13:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:50,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 22:13:50,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:13:51,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:13:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462178639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:51,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:51,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-12 22:13:51,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503788062] [2024-09-12 22:13:51,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:51,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 22:13:51,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 22:13:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:13:51,641 INFO L87 Difference]: Start difference. First operand 834 states and 1192 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-12 22:14:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:06,046 INFO L93 Difference]: Finished difference Result 1394 states and 1948 transitions. [2024-09-12 22:14:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2024-09-12 22:14:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 48 [2024-09-12 22:14:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:06,050 INFO L225 Difference]: With dead ends: 1394 [2024-09-12 22:14:06,050 INFO L226 Difference]: Without dead ends: 1258 [2024-09-12 22:14:06,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 80 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24160 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2754, Invalid=62526, Unknown=0, NotChecked=0, Total=65280 [2024-09-12 22:14:06,053 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:06,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 400 Invalid, 7062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 6761 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-12 22:14:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-09-12 22:14:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 855. [2024-09-12 22:14:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.4141176470588235) internal successors, (1202), 850 states have internal predecessors, (1202), 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) [2024-09-12 22:14:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1206 transitions. [2024-09-12 22:14:06,939 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1206 transitions. Word has length 48 [2024-09-12 22:14:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:06,939 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1206 transitions. [2024-09-12 22:14:06,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-12 22:14:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1206 transitions. [2024-09-12 22:14:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:14:06,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:06,941 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:06,958 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:07,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:07,142 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:07,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:07,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1163134880, now seen corresponding path program 23 times [2024-09-12 22:14:07,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:07,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356635158] [2024-09-12 22:14:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:07,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:07,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:14:07,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356635158] [2024-09-12 22:14:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356635158] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158364317] [2024-09-12 22:14:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:14:07,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:07,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:07,583 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) [2024-09-12 22:14:07,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 22:14:07,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-12 22:14:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:07,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 22:14:07,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:14:07,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-12 22:14:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158364317] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:08,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:08,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 12] total 39 [2024-09-12 22:14:08,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318518234] [2024-09-12 22:14:08,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:08,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 22:14:08,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:08,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 22:14:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:14:08,202 INFO L87 Difference]: Start difference. First operand 855 states and 1206 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-12 22:14:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:12,093 INFO L93 Difference]: Finished difference Result 1918 states and 2689 transitions. [2024-09-12 22:14:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-12 22:14:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 48 [2024-09-12 22:14:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:12,098 INFO L225 Difference]: With dead ends: 1918 [2024-09-12 22:14:12,098 INFO L226 Difference]: Without dead ends: 1657 [2024-09-12 22:14:12,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=984, Invalid=3176, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 22:14:12,099 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 375 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:12,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1399 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:14:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2024-09-12 22:14:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 957. [2024-09-12 22:14:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 952 states have (on average 1.3592436974789917) internal successors, (1294), 952 states have internal predecessors, (1294), 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) [2024-09-12 22:14:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1298 transitions. [2024-09-12 22:14:13,043 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1298 transitions. Word has length 48 [2024-09-12 22:14:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:13,043 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1298 transitions. [2024-09-12 22:14:13,043 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-12 22:14:13,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1298 transitions. [2024-09-12 22:14:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:14:13,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:13,046 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:13,062 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:13,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-12 22:14:13,246 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:13,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 24 times [2024-09-12 22:14:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:13,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626250523] [2024-09-12 22:14:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:13,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:13,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:14:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626250523] [2024-09-12 22:14:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626250523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327118322] [2024-09-12 22:14:13,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:14:13,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:13,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:13,437 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) [2024-09-12 22:14:13,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 22:14:13,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 22:14:13,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:13,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:14:13,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:14:13,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:14:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327118322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:13,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:13,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-12 22:14:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236487802] [2024-09-12 22:14:13,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:13,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:14:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:14:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:14:13,728 INFO L87 Difference]: Start difference. First operand 957 states and 1298 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2024-09-12 22:14:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:14,821 INFO L93 Difference]: Finished difference Result 1040 states and 1398 transitions. [2024-09-12 22:14:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:14:14,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 51 [2024-09-12 22:14:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:14,825 INFO L225 Difference]: With dead ends: 1040 [2024-09-12 22:14:14,825 INFO L226 Difference]: Without dead ends: 988 [2024-09-12 22:14:14,826 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 19 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:14:14,826 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:14,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:14:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-09-12 22:14:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 939. [2024-09-12 22:14:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3650963597430408) internal successors, (1275), 934 states have internal predecessors, (1275), 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) [2024-09-12 22:14:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1279 transitions. [2024-09-12 22:14:15,785 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1279 transitions. Word has length 51 [2024-09-12 22:14:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:15,785 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1279 transitions. [2024-09-12 22:14:15,785 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2024-09-12 22:14:15,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1279 transitions. [2024-09-12 22:14:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:14:15,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:15,786 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:15,798 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:15,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-12 22:14:15,987 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:15,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1426629135, now seen corresponding path program 25 times [2024-09-12 22:14:15,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:15,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425285254] [2024-09-12 22:14:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:16,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-12 22:14:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425285254] [2024-09-12 22:14:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425285254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122228482] [2024-09-12 22:14:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:14:16,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:16,377 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) [2024-09-12 22:14:16,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 22:14:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:16,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 22:14:16,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-12 22:14:16,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-12 22:14:17,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122228482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:17,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:17,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-12 22:14:17,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048870881] [2024-09-12 22:14:17,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:17,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 22:14:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 22:14:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:14:17,446 INFO L87 Difference]: Start difference. First operand 939 states and 1279 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-12 22:14:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:27,412 INFO L93 Difference]: Finished difference Result 1388 states and 1845 transitions. [2024-09-12 22:14:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-12 22:14:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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 51 [2024-09-12 22:14:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:27,416 INFO L225 Difference]: With dead ends: 1388 [2024-09-12 22:14:27,416 INFO L226 Difference]: Without dead ends: 1286 [2024-09-12 22:14:27,417 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6656 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1899, Invalid=20751, Unknown=0, NotChecked=0, Total=22650 [2024-09-12 22:14:27,418 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:27,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 797 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 22:14:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-12 22:14:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 939. [2024-09-12 22:14:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3511777301927195) internal successors, (1262), 934 states have internal predecessors, (1262), 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) [2024-09-12 22:14:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1266 transitions. [2024-09-12 22:14:28,339 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1266 transitions. Word has length 51 [2024-09-12 22:14:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:28,339 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1266 transitions. [2024-09-12 22:14:28,339 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-12 22:14:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1266 transitions. [2024-09-12 22:14:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:14:28,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:28,340 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:28,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:28,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:28,541 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:28,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -693108371, now seen corresponding path program 8 times [2024-09-12 22:14:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439505871] [2024-09-12 22:14:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:29,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:14:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:29,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439505871] [2024-09-12 22:14:29,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439505871] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:29,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205095764] [2024-09-12 22:14:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:14:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:29,047 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) [2024-09-12 22:14:29,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 22:14:29,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:14:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:29,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 22:14:29,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:14:29,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:14:30,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205095764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:30,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:30,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2024-09-12 22:14:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532234662] [2024-09-12 22:14:30,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:30,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 22:14:30,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 22:14:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:14:30,331 INFO L87 Difference]: Start difference. First operand 939 states and 1266 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-12 22:14:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:48,986 INFO L93 Difference]: Finished difference Result 1497 states and 2031 transitions. [2024-09-12 22:14:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-09-12 22:14:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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 51 [2024-09-12 22:14:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:48,990 INFO L225 Difference]: With dead ends: 1497 [2024-09-12 22:14:48,990 INFO L226 Difference]: Without dead ends: 1375 [2024-09-12 22:14:48,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32210 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=3237, Invalid=82319, Unknown=0, NotChecked=0, Total=85556 [2024-09-12 22:14:48,994 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 331 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 9248 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 9248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:48,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 484 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 9248 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-12 22:14:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2024-09-12 22:14:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 963. [2024-09-12 22:14:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3392484342379958) internal successors, (1283), 958 states have internal predecessors, (1283), 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) [2024-09-12 22:14:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1287 transitions. [2024-09-12 22:14:49,959 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1287 transitions. Word has length 51 [2024-09-12 22:14:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:49,959 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1287 transitions. [2024-09-12 22:14:49,959 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-12 22:14:49,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1287 transitions. [2024-09-12 22:14:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:14:49,960 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:49,960 INFO L216 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:49,972 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:50,160 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:50,161 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:50,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash -206398450, now seen corresponding path program 26 times [2024-09-12 22:14:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:50,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56416796] [2024-09-12 22:14:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:50,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:50,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:14:50,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56416796] [2024-09-12 22:14:50,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56416796] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:50,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229219565] [2024-09-12 22:14:50,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:14:50,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:50,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:50,526 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) [2024-09-12 22:14:50,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 22:14:50,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:14:50,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:50,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-12 22:14:50,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:14:50,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-12 22:14:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229219565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:51,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:51,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 16] total 45 [2024-09-12 22:14:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258577737] [2024-09-12 22:14:51,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:51,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 22:14:51,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 22:14:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:14:51,222 INFO L87 Difference]: Start difference. First operand 963 states and 1287 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:59,623 INFO L93 Difference]: Finished difference Result 1828 states and 2515 transitions. [2024-09-12 22:14:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-09-12 22:14:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-12 22:14:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:59,628 INFO L225 Difference]: With dead ends: 1828 [2024-09-12 22:14:59,628 INFO L226 Difference]: Without dead ends: 1398 [2024-09-12 22:14:59,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7225 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1455, Invalid=23351, Unknown=0, NotChecked=0, Total=24806 [2024-09-12 22:14:59,630 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 163 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:59,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1832 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-12 22:14:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2024-09-12 22:15:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1028. [2024-09-12 22:15:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1023 states have (on average 1.3870967741935485) internal successors, (1419), 1023 states have internal predecessors, (1419), 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) [2024-09-12 22:15:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1423 transitions. [2024-09-12 22:15:00,701 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1423 transitions. Word has length 51 [2024-09-12 22:15:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:15:00,701 INFO L474 AbstractCegarLoop]: Abstraction has 1028 states and 1423 transitions. [2024-09-12 22:15:00,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:15:00,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:15:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1423 transitions. [2024-09-12 22:15:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 22:15:00,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:15:00,703 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:15:00,714 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-12 22:15:00,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-12 22:15:00,903 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:15:00,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:15:00,903 INFO L85 PathProgramCache]: Analyzing trace with hash -700722420, now seen corresponding path program 27 times [2024-09-12 22:15:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:15:00,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039423872] [2024-09-12 22:15:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:15:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:15:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:15:01,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:15:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:15:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:15:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:15:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039423872] [2024-09-12 22:15:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039423872] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:15:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279247468] [2024-09-12 22:15:01,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:15:01,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:15:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:15:01,413 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:15:01,414 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-12 22:15:01,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 22:15:01,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:15:01,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:15:01,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:15:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 22:15:01,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:15:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 22:15:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279247468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:15:01,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:15:01,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2024-09-12 22:15:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495443788] [2024-09-12 22:15:01,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:15:01,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 22:15:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:15:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 22:15:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:15:01,854 INFO L87 Difference]: Start difference. First operand 1028 states and 1423 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:15:06,546 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 [] [2024-09-12 22:15:12,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:20,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:28,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:36,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:41,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:49,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:54,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:58,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:02,919 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 [] [2024-09-12 22:16:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:16:03,521 INFO L93 Difference]: Finished difference Result 1518 states and 2167 transitions. [2024-09-12 22:16:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-12 22:16:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2024-09-12 22:16:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:16:03,526 INFO L225 Difference]: With dead ends: 1518 [2024-09-12 22:16:03,526 INFO L226 Difference]: Without dead ends: 1466 [2024-09-12 22:16:03,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=651, Invalid=2884, Unknown=5, NotChecked=0, Total=3540 [2024-09-12 22:16:03,527 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 71 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:16:03,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 391 Invalid, 9 Unknown, 0 Unchecked, 37.4s Time] [2024-09-12 22:16:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2024-09-12 22:16:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1300. [2024-09-12 22:16:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1295 states have (on average 1.3976833976833978) internal successors, (1810), 1295 states have internal predecessors, (1810), 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) [2024-09-12 22:16:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1814 transitions. [2024-09-12 22:16:04,882 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1814 transitions. Word has length 53 [2024-09-12 22:16:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:16:04,883 INFO L474 AbstractCegarLoop]: Abstraction has 1300 states and 1814 transitions. [2024-09-12 22:16:04,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:16:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1814 transitions. [2024-09-12 22:16:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 22:16:04,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:16:04,885 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:16:04,902 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-12 22:16:05,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-12 22:16:05,086 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:16:05,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:05,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1311222798, now seen corresponding path program 28 times [2024-09-12 22:16:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:16:05,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304766973] [2024-09-12 22:16:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:16:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:16:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:05,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:16:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-09-12 22:16:05,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:16:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304766973] [2024-09-12 22:16:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304766973] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:16:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158491760] [2024-09-12 22:16:05,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:16:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:16:05,540 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:16:05,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-12 22:16:05,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:16:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:16:05,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 22:16:05,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:16:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 30 proven. 112 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-12 22:16:06,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:16:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 30 proven. 112 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-12 22:16:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158491760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:16:06,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:16:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2024-09-12 22:16:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749408111] [2024-09-12 22:16:06,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:16:06,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 22:16:06,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:16:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 22:16:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:16:06,790 INFO L87 Difference]: Start difference. First operand 1300 states and 1814 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2024-09-12 22:16:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:16:21,763 INFO L93 Difference]: Finished difference Result 1834 states and 2477 transitions. [2024-09-12 22:16:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-09-12 22:16:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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 54 [2024-09-12 22:16:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:16:21,769 INFO L225 Difference]: With dead ends: 1834 [2024-09-12 22:16:21,769 INFO L226 Difference]: Without dead ends: 1701 [2024-09-12 22:16:21,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 91 SyntacticMatches, 22 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11639 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2787, Invalid=33503, Unknown=0, NotChecked=0, Total=36290 [2024-09-12 22:16:21,771 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 289 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 3670 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:16:21,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 960 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3670 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 22:16:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2024-09-12 22:16:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1279. [2024-09-12 22:16:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1274 states have (on average 1.3924646781789638) internal successors, (1774), 1274 states have internal predecessors, (1774), 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) [2024-09-12 22:16:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1778 transitions. [2024-09-12 22:16:23,124 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1778 transitions. Word has length 54 [2024-09-12 22:16:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:16:23,125 INFO L474 AbstractCegarLoop]: Abstraction has 1279 states and 1778 transitions. [2024-09-12 22:16:23,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2024-09-12 22:16:23,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1778 transitions. [2024-09-12 22:16:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 22:16:23,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:16:23,126 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:16:23,138 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-12 22:16:23,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-12 22:16:23,326 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:16:23,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1486532526, now seen corresponding path program 9 times [2024-09-12 22:16:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:16:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389487159] [2024-09-12 22:16:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:16:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:16:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:23,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:16:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:16:23,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:16:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389487159] [2024-09-12 22:16:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389487159] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:16:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783596752] [2024-09-12 22:16:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:16:23,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:16:23,852 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:16:23,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-12 22:16:23,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:16:23,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:16:23,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 22:16:23,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:16:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:16:24,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:16:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:16:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783596752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:16:25,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:16:25,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15, 15] total 42 [2024-09-12 22:16:25,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340329828] [2024-09-12 22:16:25,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:16:25,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 22:16:25,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:16:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 22:16:25,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 22:16:25,357 INFO L87 Difference]: Start difference. First operand 1279 states and 1778 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 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) [2024-09-12 22:16:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:16:52,358 INFO L93 Difference]: Finished difference Result 1982 states and 2729 transitions. [2024-09-12 22:16:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2024-09-12 22:16:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 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 54 [2024-09-12 22:16:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:16:52,363 INFO L225 Difference]: With dead ends: 1982 [2024-09-12 22:16:52,364 INFO L226 Difference]: Without dead ends: 1826 [2024-09-12 22:16:52,370 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 88 SyntacticMatches, 24 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50219 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=4443, Invalid=124079, Unknown=0, NotChecked=0, Total=128522 [2024-09-12 22:16:52,370 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 524 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 11197 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 11662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 11197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:16:52,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 486 Invalid, 11662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 11197 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-12 22:16:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2024-09-12 22:16:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1304. [2024-09-12 22:16:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1299 states have (on average 1.3802925327174749) internal successors, (1793), 1299 states have internal predecessors, (1793), 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) [2024-09-12 22:16:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1797 transitions. [2024-09-12 22:16:53,810 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1797 transitions. Word has length 54 [2024-09-12 22:16:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:16:53,810 INFO L474 AbstractCegarLoop]: Abstraction has 1304 states and 1797 transitions. [2024-09-12 22:16:53,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 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) [2024-09-12 22:16:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1797 transitions. [2024-09-12 22:16:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 22:16:53,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:16:53,813 INFO L216 NwaCegarLoop]: trace histogram [17, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:16:53,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-12 22:16:54,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:54,013 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:16:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -894424064, now seen corresponding path program 29 times [2024-09-12 22:16:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:16:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034652932] [2024-09-12 22:16:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:16:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:16:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:54,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:16:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:16:54,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:16:54,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034652932] [2024-09-12 22:16:54,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034652932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:16:54,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928763638] [2024-09-12 22:16:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:16:54,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:16:54,450 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:16:54,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-12 22:16:54,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-12 22:16:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:16:54,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-12 22:16:54,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:16:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:16:54,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:16:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-09-12 22:16:55,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928763638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:16:55,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:16:55,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 14] total 45 [2024-09-12 22:16:55,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215355799] [2024-09-12 22:16:55,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:16:55,164 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 22:16:55,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:16:55,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 22:16:55,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:16:55,165 INFO L87 Difference]: Start difference. First operand 1304 states and 1797 transitions. Second operand has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 45 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) [2024-09-12 22:17:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:01,688 INFO L93 Difference]: Finished difference Result 2708 states and 3745 transitions. [2024-09-12 22:17:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-12 22:17:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 45 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 54 [2024-09-12 22:17:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:01,696 INFO L225 Difference]: With dead ends: 2708 [2024-09-12 22:17:01,696 INFO L226 Difference]: Without dead ends: 2377 [2024-09-12 22:17:01,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2024-09-12 22:17:01,697 INFO L434 NwaCegarLoop]: 86 mSDtfsCounter, 540 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 3253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:01,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1700 Invalid, 3253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2925 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 22:17:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2024-09-12 22:17:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1432. [2024-09-12 22:17:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1427 states have (on average 1.3363700070077085) internal successors, (1907), 1427 states have internal predecessors, (1907), 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) [2024-09-12 22:17:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1911 transitions. [2024-09-12 22:17:03,122 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1911 transitions. Word has length 54 [2024-09-12 22:17:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:03,123 INFO L474 AbstractCegarLoop]: Abstraction has 1432 states and 1911 transitions. [2024-09-12 22:17:03,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.511111111111111) internal successors, (68), 45 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) [2024-09-12 22:17:03,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1911 transitions. [2024-09-12 22:17:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 22:17:03,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:03,125 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:03,142 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-12 22:17:03,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:03,326 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:03,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1855386305, now seen corresponding path program 30 times [2024-09-12 22:17:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:03,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085294804] [2024-09-12 22:17:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:03,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:17:03,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:03,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085294804] [2024-09-12 22:17:03,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085294804] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:03,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703479412] [2024-09-12 22:17:03,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:17:03,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:03,628 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:17:03,629 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-12 22:17:03,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-12 22:17:03,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:17:03,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:17:03,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:17:03,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:17:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703479412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:03,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:03,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2024-09-12 22:17:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183859990] [2024-09-12 22:17:03,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:03,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:17:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:17:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:17:03,997 INFO L87 Difference]: Start difference. First operand 1432 states and 1911 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-12 22:17:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:05,712 INFO L93 Difference]: Finished difference Result 1507 states and 2001 transitions. [2024-09-12 22:17:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 22:17:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-12 22:17:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:05,715 INFO L225 Difference]: With dead ends: 1507 [2024-09-12 22:17:05,715 INFO L226 Difference]: Without dead ends: 1451 [2024-09-12 22:17:05,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 21 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:17:05,716 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:05,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 187 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:17:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2024-09-12 22:17:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1403. [2024-09-12 22:17:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1398 states have (on average 1.341917024320458) internal successors, (1876), 1398 states have internal predecessors, (1876), 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) [2024-09-12 22:17:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1880 transitions. [2024-09-12 22:17:07,108 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1880 transitions. Word has length 56 [2024-09-12 22:17:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:07,108 INFO L474 AbstractCegarLoop]: Abstraction has 1403 states and 1880 transitions. [2024-09-12 22:17:07,109 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-12 22:17:07,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1880 transitions. [2024-09-12 22:17:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 22:17:07,110 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:07,110 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:07,122 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-12 22:17:07,310 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:07,311 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:07,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -823209951, now seen corresponding path program 8 times [2024-09-12 22:17:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064165683] [2024-09-12 22:17:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:07,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:17:07,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:07,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064165683] [2024-09-12 22:17:07,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064165683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853008082] [2024-09-12 22:17:07,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:17:07,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:07,763 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:17:07,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-12 22:17:07,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:17:07,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:17:07,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-12 22:17:07,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 54 proven. 105 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 22:17:08,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 54 proven. 105 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 22:17:09,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853008082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:09,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:09,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 14] total 41 [2024-09-12 22:17:09,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988270235] [2024-09-12 22:17:09,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:09,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 22:17:09,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 22:17:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1550, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:17:09,076 INFO L87 Difference]: Start difference. First operand 1403 states and 1880 transitions. Second operand has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 41 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) [2024-09-12 22:17:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:25,089 INFO L93 Difference]: Finished difference Result 1798 states and 2392 transitions. [2024-09-12 22:17:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-09-12 22:17:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 41 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 56 [2024-09-12 22:17:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:25,093 INFO L225 Difference]: With dead ends: 1798 [2024-09-12 22:17:25,093 INFO L226 Difference]: Without dead ends: 1640 [2024-09-12 22:17:25,094 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 97 SyntacticMatches, 22 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11312 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2777, Invalid=33513, Unknown=0, NotChecked=0, Total=36290 [2024-09-12 22:17:25,095 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 314 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 5076 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 5285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 5076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:25,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1424 Invalid, 5285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 5076 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-12 22:17:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2024-09-12 22:17:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1296. [2024-09-12 22:17:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1291 states have (on average 1.350890782339272) internal successors, (1744), 1291 states have internal predecessors, (1744), 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) [2024-09-12 22:17:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1748 transitions. [2024-09-12 22:17:26,417 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1748 transitions. Word has length 56 [2024-09-12 22:17:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:26,417 INFO L474 AbstractCegarLoop]: Abstraction has 1296 states and 1748 transitions. [2024-09-12 22:17:26,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 41 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) [2024-09-12 22:17:26,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1748 transitions. [2024-09-12 22:17:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 22:17:26,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:26,419 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:26,432 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-12 22:17:26,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-12 22:17:26,620 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:26,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -460932031, now seen corresponding path program 9 times [2024-09-12 22:17:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:26,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355472591] [2024-09-12 22:17:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:26,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:27,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-12 22:17:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355472591] [2024-09-12 22:17:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355472591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098426031] [2024-09-12 22:17:27,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:17:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:27,096 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:17:27,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-12 22:17:27,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:17:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:17:27,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:17:27,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-12 22:17:27,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-12 22:17:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098426031] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:28,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:28,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 56 [2024-09-12 22:17:28,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874538966] [2024-09-12 22:17:28,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:28,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 22:17:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 22:17:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2792, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 22:17:28,476 INFO L87 Difference]: Start difference. First operand 1296 states and 1748 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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) [2024-09-12 22:18:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:18:29,794 INFO L93 Difference]: Finished difference Result 3423 states and 4795 transitions. [2024-09-12 22:18:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 482 states. [2024-09-12 22:18:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-12 22:18:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:18:29,800 INFO L225 Difference]: With dead ends: 3423 [2024-09-12 22:18:29,800 INFO L226 Difference]: Without dead ends: 3096 [2024-09-12 22:18:29,808 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106284 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=18834, Invalid=236696, Unknown=0, NotChecked=0, Total=255530 [2024-09-12 22:18:29,808 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 1232 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 8499 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 9437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 8499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:18:29,808 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1642 Invalid, 9437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 8499 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-09-12 22:18:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2024-09-12 22:18:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 1463. [2024-09-12 22:18:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1458 states have (on average 1.3251028806584362) internal successors, (1932), 1458 states have internal predecessors, (1932), 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) [2024-09-12 22:18:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1936 transitions. [2024-09-12 22:18:31,346 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1936 transitions. Word has length 56 [2024-09-12 22:18:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:18:31,346 INFO L474 AbstractCegarLoop]: Abstraction has 1463 states and 1936 transitions. [2024-09-12 22:18:31,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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) [2024-09-12 22:18:31,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1936 transitions. [2024-09-12 22:18:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 22:18:31,347 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:18:31,347 INFO L216 NwaCegarLoop]: trace histogram [18, 8, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:18:31,360 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-12 22:18:31,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-12 22:18:31,548 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:18:31,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash -457051566, now seen corresponding path program 31 times [2024-09-12 22:18:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:18:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280008448] [2024-09-12 22:18:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:18:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:18:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:31,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:18:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:18:31,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:18:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280008448] [2024-09-12 22:18:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280008448] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:18:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176520753] [2024-09-12 22:18:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:18:31,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:18:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:18:31,991 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:18:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-12 22:18:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:32,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 22:18:32,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:18:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:18:32,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:18:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2024-09-12 22:18:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176520753] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:18:32,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:18:32,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 16] total 49 [2024-09-12 22:18:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899893128] [2024-09-12 22:18:32,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:18:32,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 22:18:32,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:18:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 22:18:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 22:18:32,766 INFO L87 Difference]: Start difference. First operand 1463 states and 1936 transitions. Second operand has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 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) [2024-09-12 22:18:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:18:42,506 INFO L93 Difference]: Finished difference Result 2361 states and 3187 transitions. [2024-09-12 22:18:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2024-09-12 22:18:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 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 56 [2024-09-12 22:18:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:18:42,510 INFO L225 Difference]: With dead ends: 2361 [2024-09-12 22:18:42,510 INFO L226 Difference]: Without dead ends: 1877 [2024-09-12 22:18:42,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5818 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1542, Invalid=20214, Unknown=0, NotChecked=0, Total=21756 [2024-09-12 22:18:42,512 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 159 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 4036 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 4302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 4036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:18:42,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2267 Invalid, 4302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 4036 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 22:18:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2024-09-12 22:18:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1378. [2024-09-12 22:18:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1373 states have (on average 1.3430444282592862) internal successors, (1844), 1373 states have internal predecessors, (1844), 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) [2024-09-12 22:18:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1848 transitions. [2024-09-12 22:18:43,947 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1848 transitions. Word has length 56 [2024-09-12 22:18:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:18:43,948 INFO L474 AbstractCegarLoop]: Abstraction has 1378 states and 1848 transitions. [2024-09-12 22:18:43,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 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) [2024-09-12 22:18:43,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1848 transitions. [2024-09-12 22:18:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 22:18:43,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:18:43,949 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:18:43,961 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-12 22:18:44,149 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:18:44,150 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:18:44,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 849708417, now seen corresponding path program 10 times [2024-09-12 22:18:44,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:18:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693169612] [2024-09-12 22:18:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:18:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:18:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:44,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:18:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:18:44,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:18:44,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693169612] [2024-09-12 22:18:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693169612] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:18:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330426544] [2024-09-12 22:18:44,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:18:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:18:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:18:44,651 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:18:44,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-12 22:18:44,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:18:44,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:18:44,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-12 22:18:44,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:18:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 44 proven. 149 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-12 22:18:45,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:18:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 44 proven. 149 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-12 22:18:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330426544] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:18:46,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:18:46,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16, 16] total 45 [2024-09-12 22:18:46,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679011431] [2024-09-12 22:18:46,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:18:46,289 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 22:18:46,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:18:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 22:18:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1880, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:18:46,290 INFO L87 Difference]: Start difference. First operand 1378 states and 1848 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 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) [2024-09-12 22:18:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:18:59,451 INFO L93 Difference]: Finished difference Result 1697 states and 2264 transitions. [2024-09-12 22:18:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-09-12 22:18:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 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 58 [2024-09-12 22:18:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:18:59,455 INFO L225 Difference]: With dead ends: 1697 [2024-09-12 22:18:59,455 INFO L226 Difference]: Without dead ends: 1571 [2024-09-12 22:18:59,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 95 SyntacticMatches, 26 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1864, Invalid=17596, Unknown=0, NotChecked=0, Total=19460 [2024-09-12 22:18:59,457 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 201 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 3808 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:18:59,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1357 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3808 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-12 22:18:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2024-09-12 22:19:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1330. [2024-09-12 22:19:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1325 states have (on average 1.3449056603773586) internal successors, (1782), 1325 states have internal predecessors, (1782), 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) [2024-09-12 22:19:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1786 transitions. [2024-09-12 22:19:00,848 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1786 transitions. Word has length 58 [2024-09-12 22:19:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:00,848 INFO L474 AbstractCegarLoop]: Abstraction has 1330 states and 1786 transitions. [2024-09-12 22:19:00,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 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) [2024-09-12 22:19:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1786 transitions. [2024-09-12 22:19:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 22:19:00,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:00,850 INFO L216 NwaCegarLoop]: trace histogram [19, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:00,862 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-09-12 22:19:01,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:01,050 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 756730464, now seen corresponding path program 32 times [2024-09-12 22:19:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060967330] [2024-09-12 22:19:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:01,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:19:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:01,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060967330] [2024-09-12 22:19:01,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060967330] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:01,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721181302] [2024-09-12 22:19:01,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:19:01,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:01,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:01,526 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:19:01,526 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-12 22:19:01,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:19:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:01,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-12 22:19:01,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:19:01,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-12 22:19:02,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721181302] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:02,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:02,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 52 [2024-09-12 22:19:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814845715] [2024-09-12 22:19:02,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:02,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 22:19:02,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 22:19:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 22:19:02,426 INFO L87 Difference]: Start difference. First operand 1330 states and 1786 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:13,518 INFO L93 Difference]: Finished difference Result 2270 states and 3083 transitions. [2024-09-12 22:19:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-09-12 22:19:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2024-09-12 22:19:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:13,523 INFO L225 Difference]: With dead ends: 2270 [2024-09-12 22:19:13,523 INFO L226 Difference]: Without dead ends: 1879 [2024-09-12 22:19:13,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7534 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1709, Invalid=25681, Unknown=0, NotChecked=0, Total=27390 [2024-09-12 22:19:13,525 INFO L434 NwaCegarLoop]: 84 mSDtfsCounter, 162 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 4689 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 4946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 4689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:13,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 2543 Invalid, 4946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 4689 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 22:19:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2024-09-12 22:19:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1311. [2024-09-12 22:19:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1306 states have (on average 1.383614088820827) internal successors, (1807), 1306 states have internal predecessors, (1807), 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) [2024-09-12 22:19:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1811 transitions. [2024-09-12 22:19:15,149 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1811 transitions. Word has length 58 [2024-09-12 22:19:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:15,149 INFO L474 AbstractCegarLoop]: Abstraction has 1311 states and 1811 transitions. [2024-09-12 22:19:15,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:15,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1811 transitions. [2024-09-12 22:19:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 22:19:15,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:15,151 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:15,164 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-09-12 22:19:15,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-12 22:19:15,352 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:15,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash 355236972, now seen corresponding path program 11 times [2024-09-12 22:19:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:15,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407604950] [2024-09-12 22:19:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:15,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:15,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:19:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407604950] [2024-09-12 22:19:15,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407604950] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662894777] [2024-09-12 22:19:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:19:15,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:15,961 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:19:15,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-12 22:19:16,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 22:19:16,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:16,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-12 22:19:16,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:19:17,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 22:19:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662894777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:18,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:18,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 46, 31] total 77 [2024-09-12 22:19:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216968854] [2024-09-12 22:19:18,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:18,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-12 22:19:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-12 22:19:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=4772, Unknown=0, NotChecked=0, Total=5852 [2024-09-12 22:19:18,505 INFO L87 Difference]: Start difference. First operand 1311 states and 1811 transitions. Second operand has 77 states, 77 states have (on average 1.4675324675324675) internal successors, (113), 77 states have internal predecessors, (113), 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) [2024-09-12 22:19:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:34,921 INFO L93 Difference]: Finished difference Result 2381 states and 3361 transitions. [2024-09-12 22:19:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2024-09-12 22:19:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.4675324675324675) internal successors, (113), 77 states have internal predecessors, (113), 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 59 [2024-09-12 22:19:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:34,926 INFO L225 Difference]: With dead ends: 2381 [2024-09-12 22:19:34,926 INFO L226 Difference]: Without dead ends: 2090 [2024-09-12 22:19:34,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17714 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13431, Invalid=55475, Unknown=0, NotChecked=0, Total=68906 [2024-09-12 22:19:34,931 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 452 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 9022 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 9605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 9022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:34,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1287 Invalid, 9605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 9022 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-09-12 22:19:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2024-09-12 22:19:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1077. [2024-09-12 22:19:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1072 states have (on average 1.3833955223880596) internal successors, (1483), 1072 states have internal predecessors, (1483), 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) [2024-09-12 22:19:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1487 transitions. [2024-09-12 22:19:36,444 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1487 transitions. Word has length 59 [2024-09-12 22:19:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:36,445 INFO L474 AbstractCegarLoop]: Abstraction has 1077 states and 1487 transitions. [2024-09-12 22:19:36,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.4675324675324675) internal successors, (113), 77 states have internal predecessors, (113), 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) [2024-09-12 22:19:36,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1487 transitions. [2024-09-12 22:19:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 22:19:36,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:36,446 INFO L216 NwaCegarLoop]: trace histogram [20, 8, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:36,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-09-12 22:19:36,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-12 22:19:36,647 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:36,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash -926100398, now seen corresponding path program 33 times [2024-09-12 22:19:36,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:36,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373180691] [2024-09-12 22:19:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:37,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 22:19:37,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:37,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373180691] [2024-09-12 22:19:37,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373180691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:37,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902808780] [2024-09-12 22:19:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:19:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:37,203 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:19:37,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-12 22:19:37,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 22:19:37,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:37,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 22:19:37,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-12 22:19:37,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-12 22:19:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902808780] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:38,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:38,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18, 18] total 55 [2024-09-12 22:19:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914043634] [2024-09-12 22:19:38,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:38,565 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 22:19:38,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 22:19:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2760, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 22:19:38,566 INFO L87 Difference]: Start difference. First operand 1077 states and 1487 transitions. Second operand has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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) [2024-09-12 22:19:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:58,337 INFO L93 Difference]: Finished difference Result 2253 states and 3067 transitions. [2024-09-12 22:19:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2024-09-12 22:19:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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 60 [2024-09-12 22:19:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:58,342 INFO L225 Difference]: With dead ends: 2253 [2024-09-12 22:19:58,342 INFO L226 Difference]: Without dead ends: 1601 [2024-09-12 22:19:58,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18934 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3137, Invalid=58615, Unknown=0, NotChecked=0, Total=61752 [2024-09-12 22:19:58,346 INFO L434 NwaCegarLoop]: 92 mSDtfsCounter, 237 mSDsluCounter, 2981 mSDsCounter, 0 mSdLazyCounter, 7402 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 7931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 7402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:58,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 3073 Invalid, 7931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 7402 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-09-12 22:19:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2024-09-12 22:19:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 977. [2024-09-12 22:19:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.396090534979424) internal successors, (1357), 972 states have internal predecessors, (1357), 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) [2024-09-12 22:19:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1361 transitions. [2024-09-12 22:19:59,814 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1361 transitions. Word has length 60 [2024-09-12 22:19:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:59,814 INFO L474 AbstractCegarLoop]: Abstraction has 977 states and 1361 transitions. [2024-09-12 22:19:59,814 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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) [2024-09-12 22:19:59,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1361 transitions. [2024-09-12 22:19:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 22:19:59,816 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:59,816 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:59,828 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-09-12 22:20:00,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-12 22:20:00,016 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:20:00,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:20:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2007553199, now seen corresponding path program 12 times [2024-09-12 22:20:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:20:00,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319124450] [2024-09-12 22:20:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:20:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:20:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:20:00,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:20:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:20:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:20:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:20:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319124450] [2024-09-12 22:20:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319124450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:20:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031615556] [2024-09-12 22:20:00,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:20:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:20:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:20:00,695 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:20:00,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-12 22:20:00,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-12 22:20:00,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:20:00,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-12 22:20:00,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:20:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 39 proven. 201 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-12 22:20:01,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:20:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 39 proven. 201 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-12 22:20:02,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031615556] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:20:02,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:20:02,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 18, 18] total 51 [2024-09-12 22:20:02,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698307751] [2024-09-12 22:20:02,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:20:02,905 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 22:20:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:20:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 22:20:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 22:20:02,906 INFO L87 Difference]: Start difference. First operand 977 states and 1361 transitions. Second operand has 51 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 51 states have internal predecessors, (96), 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) [2024-09-12 22:20:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:20:40,619 INFO L93 Difference]: Finished difference Result 1547 states and 2211 transitions. [2024-09-12 22:20:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 377 states. [2024-09-12 22:20:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 51 states have internal predecessors, (96), 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 62 [2024-09-12 22:20:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:20:40,622 INFO L225 Difference]: With dead ends: 1547 [2024-09-12 22:20:40,622 INFO L226 Difference]: Without dead ends: 1358 [2024-09-12 22:20:40,629 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 96 SyntacticMatches, 30 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62552 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=4774, Invalid=158846, Unknown=0, NotChecked=0, Total=163620 [2024-09-12 22:20:40,630 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 423 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 16504 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 17041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 16504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:20:40,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 551 Invalid, 17041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 16504 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-09-12 22:20:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2024-09-12 22:20:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 920. [2024-09-12 22:20:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 915 states have (on average 1.3770491803278688) internal successors, (1260), 915 states have internal predecessors, (1260), 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) [2024-09-12 22:20:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1264 transitions. [2024-09-12 22:20:42,039 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1264 transitions. Word has length 62 [2024-09-12 22:20:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:20:42,039 INFO L474 AbstractCegarLoop]: Abstraction has 920 states and 1264 transitions. [2024-09-12 22:20:42,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 51 states have internal predecessors, (96), 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) [2024-09-12 22:20:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:20:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1264 transitions. [2024-09-12 22:20:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-12 22:20:42,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:20:42,040 INFO L216 NwaCegarLoop]: trace histogram [21, 8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:20:42,052 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-12 22:20:42,240 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-12 22:20:42,241 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:20:42,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:20:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1930870814, now seen corresponding path program 34 times [2024-09-12 22:20:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:20:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810549927] [2024-09-12 22:20:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:20:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:20:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:20:42,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:20:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:20:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:20:42,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:20:42,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810549927] [2024-09-12 22:20:42,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810549927] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:20:42,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311963338] [2024-09-12 22:20:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:20:42,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:20:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:20:42,832 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:20:42,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-12 22:20:42,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:20:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:20:42,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-12 22:20:42,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:20:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:20:42,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:20:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2024-09-12 22:20:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311963338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:20:43,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:20:43,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 11] total 43 [2024-09-12 22:20:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359336834] [2024-09-12 22:20:43,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:20:43,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 22:20:43,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:20:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 22:20:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:20:43,343 INFO L87 Difference]: Start difference. First operand 920 states and 1264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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) [2024-09-12 22:21:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:09,430 INFO L93 Difference]: Finished difference Result 2252 states and 3112 transitions. [2024-09-12 22:21:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2024-09-12 22:21:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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 63 [2024-09-12 22:21:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:09,435 INFO L225 Difference]: With dead ends: 2252 [2024-09-12 22:21:09,435 INFO L226 Difference]: Without dead ends: 1931 [2024-09-12 22:21:09,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39748 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5614, Invalid=98392, Unknown=0, NotChecked=0, Total=104006 [2024-09-12 22:21:09,439 INFO L434 NwaCegarLoop]: 86 mSDtfsCounter, 180 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 12057 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 12392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 12057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:09,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2600 Invalid, 12392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 12057 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-09-12 22:21:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2024-09-12 22:21:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1061. [2024-09-12 22:21:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1056 states have (on average 1.3541666666666667) internal successors, (1430), 1056 states have internal predecessors, (1430), 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) [2024-09-12 22:21:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1434 transitions. [2024-09-12 22:21:11,139 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1434 transitions. Word has length 63 [2024-09-12 22:21:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:11,139 INFO L474 AbstractCegarLoop]: Abstraction has 1061 states and 1434 transitions. [2024-09-12 22:21:11,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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) [2024-09-12 22:21:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1434 transitions. [2024-09-12 22:21:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 22:21:11,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:11,141 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:11,153 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-12 22:21:11,341 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:11,341 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:11,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash 798710348, now seen corresponding path program 13 times [2024-09-12 22:21:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718355838] [2024-09-12 22:21:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:12,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:21:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:12,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718355838] [2024-09-12 22:21:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718355838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:12,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726560315] [2024-09-12 22:21:12,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:21:12,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:12,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:12,086 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:12,086 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-12 22:21:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:12,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:21:12,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-12 22:21:12,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-12 22:21:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726560315] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:13,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:13,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19, 19] total 71 [2024-09-12 22:21:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94197145] [2024-09-12 22:21:13,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:13,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-12 22:21:13,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-12 22:21:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=4236, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 22:21:13,888 INFO L87 Difference]: Start difference. First operand 1061 states and 1434 transitions. Second operand has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 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) [2024-09-12 22:21:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:42,659 INFO L93 Difference]: Finished difference Result 3388 states and 4921 transitions. [2024-09-12 22:21:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2024-09-12 22:21:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 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 65 [2024-09-12 22:21:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:42,665 INFO L225 Difference]: With dead ends: 3388 [2024-09-12 22:21:42,665 INFO L226 Difference]: Without dead ends: 3260 [2024-09-12 22:21:42,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40476 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=16005, Invalid=113235, Unknown=0, NotChecked=0, Total=129240 [2024-09-12 22:21:42,669 INFO L434 NwaCegarLoop]: 89 mSDtfsCounter, 1070 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 18218 mSolverCounterSat, 1149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 19367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1149 IncrementalHoareTripleChecker+Valid, 18218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:42,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 3394 Invalid, 19367 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1149 Valid, 18218 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2024-09-12 22:21:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2024-09-12 22:21:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1432. [2024-09-12 22:21:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1427 states have (on average 1.4043447792571828) internal successors, (2004), 1427 states have internal predecessors, (2004), 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) [2024-09-12 22:21:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2008 transitions. [2024-09-12 22:21:45,264 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2008 transitions. Word has length 65 [2024-09-12 22:21:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:45,264 INFO L474 AbstractCegarLoop]: Abstraction has 1432 states and 2008 transitions. [2024-09-12 22:21:45,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.5070422535211268) internal successors, (107), 71 states have internal predecessors, (107), 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) [2024-09-12 22:21:45,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2008 transitions. [2024-09-12 22:21:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 22:21:45,266 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:45,266 INFO L216 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:45,278 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-09-12 22:21:45,466 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:45,466 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1768256178, now seen corresponding path program 35 times [2024-09-12 22:21:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:45,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146340696] [2024-09-12 22:21:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:46,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:21:46,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146340696] [2024-09-12 22:21:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146340696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201984012] [2024-09-12 22:21:46,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:21:46,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:46,049 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:46,049 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-12 22:21:46,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 22:21:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:46,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-12 22:21:46,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:21:46,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-09-12 22:21:47,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201984012] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:47,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:47,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 12] total 43 [2024-09-12 22:21:47,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026172504] [2024-09-12 22:21:47,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:47,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 22:21:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 22:21:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1708, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:21:47,089 INFO L87 Difference]: Start difference. First operand 1432 states and 2008 transitions. Second operand has 43 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 42 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:22:03,555 INFO L93 Difference]: Finished difference Result 3471 states and 4691 transitions. [2024-09-12 22:22:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-12 22:22:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 42 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2024-09-12 22:22:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:22:03,561 INFO L225 Difference]: With dead ends: 3471 [2024-09-12 22:22:03,562 INFO L226 Difference]: Without dead ends: 2874 [2024-09-12 22:22:03,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=6018, Unknown=0, NotChecked=0, Total=6320 [2024-09-12 22:22:03,563 INFO L434 NwaCegarLoop]: 102 mSDtfsCounter, 132 mSDsluCounter, 3083 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 5298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:22:03,563 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 3185 Invalid, 5298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 5208 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 22:22:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2024-09-12 22:22:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1609. [2024-09-12 22:22:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1604 states have (on average 1.3846633416458853) internal successors, (2221), 1604 states have internal predecessors, (2221), 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) [2024-09-12 22:22:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2225 transitions. [2024-09-12 22:22:06,643 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2225 transitions. Word has length 65 [2024-09-12 22:22:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:22:06,643 INFO L474 AbstractCegarLoop]: Abstraction has 1609 states and 2225 transitions. [2024-09-12 22:22:06,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 42 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:06,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2225 transitions. [2024-09-12 22:22:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 22:22:06,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:22:06,645 INFO L216 NwaCegarLoop]: trace histogram [23, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:22:06,657 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-09-12 22:22:06,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:22:06,845 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:22:06,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1638546592, now seen corresponding path program 36 times [2024-09-12 22:22:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:22:06,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752726463] [2024-09-12 22:22:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:22:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:22:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:07,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:22:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:22:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:22:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752726463] [2024-09-12 22:22:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752726463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:22:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525021137] [2024-09-12 22:22:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:22:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:22:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:22:07,479 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:22:07,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-12 22:22:07,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-12 22:22:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:22:07,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:22:07,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:22:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2024-09-12 22:22:08,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:22:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2024-09-12 22:22:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525021137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:22:08,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:22:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 16, 16] total 56 [2024-09-12 22:22:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646521478] [2024-09-12 22:22:08,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:22:08,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 22:22:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:22:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 22:22:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2627, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 22:22:08,812 INFO L87 Difference]: Start difference. First operand 1609 states and 2225 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 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) [2024-09-12 22:22:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:22:32,965 INFO L93 Difference]: Finished difference Result 3773 states and 5057 transitions. [2024-09-12 22:22:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-09-12 22:22:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 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 66 [2024-09-12 22:22:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:22:32,973 INFO L225 Difference]: With dead ends: 3773 [2024-09-12 22:22:32,973 INFO L226 Difference]: Without dead ends: 3182 [2024-09-12 22:22:32,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10830 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5562, Invalid=30728, Unknown=0, NotChecked=0, Total=36290 [2024-09-12 22:22:32,975 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 1017 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 6520 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 7003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 6520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:22:32,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 2509 Invalid, 7003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 6520 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-12 22:22:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2024-09-12 22:22:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1845. [2024-09-12 22:22:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1840 states have (on average 1.3342391304347827) internal successors, (2455), 1840 states have internal predecessors, (2455), 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) [2024-09-12 22:22:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2459 transitions. [2024-09-12 22:22:36,055 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2459 transitions. Word has length 66 [2024-09-12 22:22:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:22:36,055 INFO L474 AbstractCegarLoop]: Abstraction has 1845 states and 2459 transitions. [2024-09-12 22:22:36,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 56 states have internal predecessors, (73), 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) [2024-09-12 22:22:36,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2459 transitions. [2024-09-12 22:22:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 22:22:36,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:22:36,058 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:22:36,077 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-09-12 22:22:36,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-09-12 22:22:36,258 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:22:36,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -982050976, now seen corresponding path program 37 times [2024-09-12 22:22:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:22:36,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595412306] [2024-09-12 22:22:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:22:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:22:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:36,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:22:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-12 22:22:36,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:22:36,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595412306] [2024-09-12 22:22:36,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595412306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:22:36,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776152262] [2024-09-12 22:22:36,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:22:36,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:22:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:22:36,968 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:22:36,969 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-12 22:22:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:37,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-12 22:22:37,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:22:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 56 proven. 230 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-09-12 22:22:37,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:22:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 56 proven. 230 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-09-12 22:22:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776152262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:22:39,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:22:39,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19, 19] total 54 [2024-09-12 22:22:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007231406] [2024-09-12 22:22:39,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:22:39,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 22:22:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:22:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 22:22:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2741, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 22:22:39,404 INFO L87 Difference]: Start difference. First operand 1845 states and 2459 transitions. Second operand has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 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) [2024-09-12 22:23:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:23:24,670 INFO L93 Difference]: Finished difference Result 2773 states and 3690 transitions. [2024-09-12 22:23:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2024-09-12 22:23:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 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 68 [2024-09-12 22:23:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:23:24,676 INFO L225 Difference]: With dead ends: 2773 [2024-09-12 22:23:24,676 INFO L226 Difference]: Without dead ends: 2665 [2024-09-12 22:23:24,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 109 SyntacticMatches, 32 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24080 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=5302, Invalid=68954, Unknown=0, NotChecked=0, Total=74256 [2024-09-12 22:23:24,679 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 469 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 6806 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 7163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 6806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:23:24,679 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1692 Invalid, 7163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 6806 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-09-12 22:23:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2024-09-12 22:23:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1845. [2024-09-12 22:23:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1840 states have (on average 1.3331521739130434) internal successors, (2453), 1840 states have internal predecessors, (2453), 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) [2024-09-12 22:23:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2457 transitions. [2024-09-12 22:23:27,887 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2457 transitions. Word has length 68 [2024-09-12 22:23:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:23:27,887 INFO L474 AbstractCegarLoop]: Abstraction has 1845 states and 2457 transitions. [2024-09-12 22:23:27,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 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) [2024-09-12 22:23:27,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:23:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2457 transitions. [2024-09-12 22:23:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-12 22:23:27,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:23:27,889 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:23:27,901 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-12 22:23:28,089 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:23:28,090 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:23:28,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:23:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -441679955, now seen corresponding path program 38 times [2024-09-12 22:23:28,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:23:28,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449937217] [2024-09-12 22:23:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:23:28,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:23:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:23:28,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:23:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:23:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:23:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:23:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449937217] [2024-09-12 22:23:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449937217] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:23:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38324754] [2024-09-12 22:23:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:23:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:23:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:23:28,959 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:23:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-12 22:23:29,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:23:29,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:23:29,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-12 22:23:29,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:23:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 261 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-12 22:23:29,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:23:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 261 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-12 22:23:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38324754] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:23:31,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:23:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 20, 20] total 57 [2024-09-12 22:23:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700921104] [2024-09-12 22:23:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:23:31,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 22:23:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:23:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 22:23:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 22:23:31,672 INFO L87 Difference]: Start difference. First operand 1845 states and 2457 transitions. Second operand has 57 states, 57 states have (on average 1.894736842105263) internal successors, (108), 57 states have internal predecessors, (108), 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) Killed by 15